Mặc dù P, nhưng/vẫn Q presents P as a real obstacle or a substantial counter-consideration that nevertheless fails to prevent Q. It often corresponds to although or even though: Mặc dù ngân sách hạn hẹp, dự án vẫn hoàn thành đúng hạn “Although the budget was limited, the project was still completed on time.” In formal argument, Vietnamese also uses sentence-level connectors such as tuy nhiên, mặc dù vậy, dẫu vậy, song, and song le to relate whole propositions.
These forms illustrate a general feature of Vietnamese clause linking: a relation may be encoded by an explicit pair, by one linker plus a result particle, or by discourse juxtaposition. The more complex the argument, the more useful explicit signaling becomes. This page does not reteach declarative complements; see Rằng and Declarative Complements for the syntax and omission of rằng.
Mặc dù as a subordinate concessive linker
The central patterns are mặc dù P nhưng Q, mặc dù P, Q vẫn..., and the emphatic mặc dù P nhưng Q vẫn....
Mặc dù bằng chứng còn hạn chế nhưng nhóm nghiên cứu vẫn công bố kết quả sơ bộ.
Although the evidence remains limited, the research team still published the preliminary results.
Mặc dù đã được cảnh báo nhiều lần, công ty vẫn không khắc phục lỗ hổng.
Despite having been warned many times, the company still did not fix the vulnerability.
Mặc dù is pan-regional and usable in speech, but it is somewhat weightier than tuy or dù, making it common in news, administration, academic prose, and deliberate argument. Mặc dầu is a recognized variant, often associated with older, literary, or regionally colored writing; label it rather than silently mixing it into a contemporary neutral model.
A formal-concession decision aid
| Form | Scope and effect | Register |
|---|---|---|
| mặc dù P nhưng/vẫn Q | subordinates P as a strong counter-consideration | neutral to formal |
| P. Tuy nhiên, Q. | general “however”; starts a new sentence or clause | formal, academic, journalistic |
| P. Mặc dù vậy, Q vẫn... | “despite that”; explicitly resumes all of P as an obstacle | formal |
| P, song Q | concise adversative “yet/but” | formal, literary |
| P, dẫu vậy Q vẫn... | elevated “even so/nevertheless” | literary to formal |
| P, song le Q | older “however/nevertheless” | literary, archaic |
Tỷ lệ phản hồi thấp. Tuy nhiên, dữ liệu vẫn cho thấy một xu hướng nhất quán.
The response rate was low. However, the data still show a consistent trend. (academic)
Đề xuất đã được sửa đổi nhiều lần. Mặc dù vậy, hội đồng vẫn chưa thông qua.
The proposal was revised several times. Despite that, the council still has not approved it. (formal)
Ông không đồng tình, song ông vẫn cam kết thực hiện quyết định chung.
He disagreed, yet he remained committed to implementing the collective decision. (formal)
Tuy nhiên merely signals contrast and need not imply that P would normally prevent Q. Mặc dù vậy more clearly treats the preceding proposition as an obstacle. Song coordinates rather than subordinating: it cannot simply replace mặc dù at the start of the first clause.
Clause order and information structure
Putting mặc dù P first asks the reader to hold the obstacle in mind before receiving the outcome. Putting it after Q demotes it to a qualification:
Chúng tôi quyết định tiếp tục dự án, mặc dù chi phí đã tăng đáng kể.
We decided to continue the project, although costs had increased considerably.
In result-first order, do not add nhưng after the trailing clause: nhưng introduces Q, which has already appeared. In formal prose, punctuation should make the attachment visible.
The obstacle may be a whole proposition, a reduced predicate with a shared subject, or a nominal-looking sequence:
Mặc dù rất mệt, chị vẫn ở lại để hoàn thành báo cáo.
Although very tired, she stayed to finish the report.
The understood subject of rất mệt is chị. This is not an English participial clause, and no form of be is required.
The surrounding complex-sentence system
Formal prose often nests relations. A minimal contrast prevents one connector from being mistaken for another:
| Model | Logical job |
|---|---|
| Tôi biết rằng anh ấy đến. | complement: the content of knowing |
| người mà tôi gặp | relative: identifies or describes a person |
| nếu trời mưa thì ở nhà | condition: Q depends on P |
| vì bận nên tôi về sớm | cause: P explains actual Q |
| mặc dù bận nhưng tôi vẫn ở lại | concession: P fails to block actual Q |
Báo cáo kết luận rằng mặc dù chính sách đã tạo thêm việc làm nhưng lợi ích chưa được phân bổ đồng đều.
The report concludes that although the policy created additional jobs, the benefits have not been distributed evenly.
The complement of kết luận is everything after rằng. Inside it, mặc dù...nhưng balances two findings. Here rằng helps in formal writing because the complement is long; in conversation after nói, nghĩ, or biết, it is often omitted.
Những người mà chúng tôi phỏng vấn cho biết rằng mặc dù họ ủng hộ mục tiêu của dự án nhưng họ lo ngại về chi phí.
The people we interviewed said that although they supported the project's goal, they were concerned about the cost.
The relative clause mà chúng tôi phỏng vấn follows những người. English whom has no pronoun counterpart before chúng tôi. The reported proposition has no tense backshift: discourse context and aspect establish when support and concern hold.
Condition, cause, and purpose inside concession
Mặc dù nếu áp dụng ngay thì chi phí sẽ giảm nhưng ban lãnh đạo vẫn hoãn kế hoạch để tham vấn thêm.
Although immediate implementation would reduce costs, management still postponed the plan in order to conduct further consultation.
The embedded nếu...thì states a projected consequence. The outer mặc dù...nhưng...vẫn says that this advantage did not prevent postponement; để gives the purpose of postponing. In academic prose, such nesting is possible, but two shorter sentences may be clearer.
Mặc dù trước khi ký hợp đồng hai bên đã kiểm tra kỹ nhưng vì phụ lục ghi sai đơn vị tiền tệ nên họ vẫn phải sửa lại.
Although both parties checked carefully before signing the contract, because the appendix stated the wrong currency, they still had to revise it.
Trước khi orders the checking and signing. Vì...nên gives the actual cause of revision. The outer concessive frame contrasts that revision with the expectation created by careful checking. Repeating vẫn makes the persistence of the unwanted result explicit.
Paragraph: choosing a formal connector
Bản thử nghiệm đã đáp ứng hầu hết tiêu chí kỹ thuật. Tuy nhiên, hệ thống chưa ổn định khi lượng truy cập tăng cao. Mặc dù vậy, hội đồng vẫn cho phép nhóm tiếp tục thử nghiệm có kiểm soát để thu thập thêm dữ liệu.
The prototype met most technical criteria. However, the system was not stable under high traffic. Despite that, the council still allowed the team to continue controlled testing in order to collect more data.
The first tuy nhiên introduces a contrasting limitation, not necessarily an overridden obstacle. Mặc dù vậy then takes the entire instability claim as a counter-consideration to permission. Replacing both with nhưng would be understandable but flatten the paragraph's formal argumentative architecture.
Common Mistakes
1. Combining incompatible openings
❌ Mặc dù tuy dữ liệu ít nhưng kết luận vẫn chắc chắn.
Incorrect: mặc dù and tuy compete for the same concessive opening.
✅ Mặc dù dữ liệu ít nhưng kết luận vẫn khá chắc chắn.
Although the data are limited, the conclusion remains fairly robust.
Choose one subordinating linker. Add nhưng or vẫn on the result side, not a second opener on the concession side.
2. Using song as though it meant although
❌ Song ngân sách hạn hẹp, dự án vẫn hoàn thành.
Incorrect for ‘although the budget was limited’: song coordinates with a preceding proposition rather than subordinating this obstacle.
✅ Mặc dù ngân sách hạn hẹp, dự án vẫn hoàn thành.
Although the budget was limited, the project was completed.
Alternatively write Ngân sách hạn hẹp, song dự án vẫn hoàn thành “The budget was limited, yet the project was completed.”
3. Copying English relative-pronoun order
❌ Những người ai chúng tôi phỏng vấn mặc dù bận nhưng vẫn trả lời đầy đủ.
Incorrect: ai is not a relative ‘who/whom.’
✅ Những người mà chúng tôi phỏng vấn mặc dù bận nhưng vẫn trả lời đầy đủ.
The people we interviewed gave full answers despite being busy.
The postnominal relative uses optional mà and an object gap after phỏng vấn.
4. Translating every English that with rằng
Tôi nói rằng mặc dù muộn nhưng tôi vẫn sẽ đến.
I said that although it was late, I would still come. (correct but heavy for casual speech)
✅ Tớ bảo mặc dù muộn nhưng tớ vẫn đến.
I said I'd still come even though it was late. (informal)
Keep rằng in formal attribution—báo cáo cho biết rằng...—or when it clarifies a long complement. Omit it naturally in uncomplicated conversation.
5. Losing the result after a long concession
❌ Mặc dù trước khi họp đã gửi tài liệu và vì mọi người bận nên đọc chưa kỹ.
Incorrect: the sentence opens a concession but never provides a clearly marked contrary result.
✅ Mặc dù tài liệu đã được gửi trước khi họp nhưng vì mọi người bận nên nhiều người vẫn chưa đọc kỹ.
Although the materials were sent before the meeting, because everyone was busy, many people still had not read them carefully.
The repair closes mặc dù...nhưng, keeps vì...nên inside the result, and names the subject of chưa đọc kỹ.
Key Takeaways
- Mặc dù P nhưng/vẫn Q gives substantial rhetorical weight to an obstacle that does not prevent Q.
- Tuy nhiên marks a general formal contrast; mặc dù vậy means “despite that”; song is a formal/literary coordinator.
- A trailing mặc dù P is a qualification after Q and does not take a following nhưng.
- Formal density is useful only while scope remains visible: close concessive, conditional, causal, temporal, and purpose relations cleanly.
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- Tuy...Nhưng ConcessionC1 — Use tuy...nhưng to balance an acknowledged fact against an unexpected or contrasting conclusion.
- Dù...Nhưng ConcessionC1 — Use dù with nhưng, vẫn, or a bare result clause to present an obstacle that does not prevent an outcome.
- Rằng and Declarative ComplementsA2 — Use rằng to introduce a declarative clause after verbs of saying, thinking, knowing, and believing, especially in careful or written Vietnamese.
- Nếu...Thì ConditionalsC1 — Build open Vietnamese conditionals with nếu...thì and interpret time, probability, and counterfactuality from context rather than verb inflection.