Chúng tôi chọn chuyển phát nhanh.

Chúng tôi means we, but specifically we excluding you.

This is an important distinction in Vietnamese:

• chúng tôi = we, not including the listener
• chúng ta = we, including the listener

So if a customer says Chúng tôi chọn chuyển phát nhanh to a shop, it means We choose express delivery, and the shop employee is not part of that we.

Also, chúng tôi sounds fairly neutral and polite. In casual speech, people may also say tụi tôi or bọn tôi.

It follows a very common Vietnamese pattern:

Subject + Verb + Object

• Chúng tôi = subject
• chọn = verb
• chuyển phát nhanh = object / the option being chosen

So the structure is very close to English:

• We
  • choose
    • express delivery

Vietnamese often uses straightforward word order like this, which makes basic sentences relatively easy to parse.

In this sentence, it is best understood as one fixed expression meaning express delivery.

Its parts are:

• chuyển phát = dispatch / delivery
• nhanh = fast

But in real usage, chuyển phát nhanh is a set phrase for a delivery service type, much like express shipping or courier express service in English.

So although you can analyze the words, learners should memorize chuyển phát nhanh as a useful chunk.

Because Vietnamese normally does not use articles the way English does.

English often needs:

• a service
• the express delivery option

Vietnamese can simply say:

• chuyển phát nhanh

The meaning is usually clear from context.

If a speaker wants to make the noun more explicit, they might say:

• dịch vụ chuyển phát nhanh = express delivery service
• hình thức chuyển phát nhanh = express delivery method/option

But the shorter version in your sentence is completely normal.

Because here chọn is followed by a thing being chosen, not an action.

In English, compare:

• We choose express delivery → choosing a service/option
• We choose to send it by express delivery → choosing to do an action

Your Vietnamese sentence matches the first pattern:

• chọn + chuyển phát nhanh

If you wanted the second idea, Vietnamese would be phrased differently, for example:

• Chúng tôi chọn gửi bằng chuyển phát nhanh = We choose to send it by express delivery

So in your sentence, chuyển phát nhanh works like the selected option, not like a verb after to.

By itself, chọn does not show tense.

Vietnamese verbs do not change form the way English verbs do. So chọn can mean:

• choose
• chose
• have chosen

depending on context.

If you want to make the time clearer, Vietnamese often adds time words or markers:

• Chúng tôi đã chọn chuyển phát nhanh = We chose / have chosen express delivery
• Chúng tôi đang chọn chuyển phát nhanh = We are choosing express delivery
• Chúng tôi sẽ chọn chuyển phát nhanh = We will choose express delivery

So tense is usually understood from context or from words like đã, đang, and sẽ.

Yes, it is understandable and natural, especially in a context where different shipping options are being discussed.

That said, native speakers may sometimes say a slightly fuller version for clarity, such as:

• Chúng tôi chọn dịch vụ chuyển phát nhanh
• Chúng tôi chọn hình thức chuyển phát nhanh

These sound a bit more explicit, because they clearly state that express delivery is a service or method being selected.

In everyday situations, especially online shopping, you might also hear wording based on giao hàng nhanh depending on the context.

So your sentence is good, but there are a few common variants.

Sometimes yes.

Vietnamese often omits the subject when it is already clear from context. For example, on a form, app, or order page, you might just see:

• Chọn chuyển phát nhanh

That can mean something like:

• Choose express delivery
• Select express delivery

But in a full statement, especially when saying what we decided, keeping chúng tôi is more complete:

• Chúng tôi chọn chuyển phát nhanh

So whether you include the subject depends on context and style.

A useful tone breakdown is:

• chúng — sắc tone
• tôi — ngang tone
• chọn — nặng tone
• chuyển — hỏi tone
• phát — sắc tone
• nhanh — ngang tone

A few pronunciation notes for English speakers:

• The ch sound in Vietnamese is not exactly the same as English ch, though using an English-like ch is a reasonable beginner approximation.
• chuyển is the trickiest word for many learners because of the vowel combination and the hỏi tone.
• chọn has the nặng tone, which is short and heavy.

If you practice it in chunks, it becomes easier:

• Chúng tôi
• chọn
• chuyển phát nhanh

Then put it together smoothly: Chúng tôi chọn chuyển phát nhanh.

The difference is simply who is making the choice:

• tôi = I
• chúng tôi = we, excluding the listener

So:

• Tôi chọn chuyển phát nhanh = I choose express delivery
• Chúng tôi chọn chuyển phát nhanh = We choose express delivery

Vietnamese pronouns are very important, because they often show social relationship and group membership more clearly than English does. In this sentence, chúng tôi tells you the choice is being made by more than one person.