Triệu chứng này khá rõ.

Vietnamese often uses adjectives directly as predicates.

So in English you say:

• This symptom is clear.

But in Vietnamese, you can say:

• Triệu chứng này rõ.

There is no need for a separate verb meaning is here. The adjective rõ acts like the predicate.

Using là here would sound unnatural. Là is mainly used when linking one noun to another, not usually before an adjective.

Này means this.

In Vietnamese, demonstratives like này usually come after the noun, not before it. So:

• triệu chứng này = this symptom
• literally: symptom this

This is a very common word order in Vietnamese.

Compare:

• người này = this person
• cuốn sách này = this book

So triệu chứng này follows a normal Vietnamese pattern.

It can mean either symptom or symptoms, depending on context.

Vietnamese nouns usually do not change form for singular vs. plural. So triệu chứng itself does not tell you whether it is one symptom or several.

In this sentence, because of này (this), English will usually interpret it as this symptom. But in some contexts, Vietnamese can still be flexible.

If you want to make plurality clearer, Vietnamese can add words such as:

• các triệu chứng = the symptoms
• những triệu chứng = symptoms / the symptoms

Vietnamese classifiers are common, but they are not required in every situation.

With many abstract, technical, or formal nouns, especially in medical language, it is very normal to say just:

• triệu chứng này

instead of something with a classifier.

In everyday speech, classifiers are often used more with concrete countable objects, for example:

• cuốn sách này = this book
• cái bàn này = this table

But with a noun like triệu chứng, leaving out a classifier is perfectly natural.

Khá means quite, fairly, or rather.

So:

• khá rõ = quite clear / fairly clear

It usually suggests a moderate degree, not the strongest possible one.

A rough comparison:

• rõ = clear
• khá rõ = quite clear
• rất rõ = very clear

So khá softens the statement a bit compared with rất.

Both are degree words, but they are not equally strong.

• khá = quite / fairly / rather
• rất = very

So:

• Triệu chứng này khá rõ. = This symptom is quite clear.
• Triệu chứng này rất rõ. = This symptom is very clear.

Khá often sounds a bit more measured or less absolute than rất.

Rõ literally means clear, but depending on context it can also mean:

• obvious
• evident
• distinct

In a medical sentence like this, rõ usually means the symptom is easy to notice, easy to identify, or plainly present.

You will also see rõ in other expressions, for example:

• nói rõ = explain clearly / speak clearly
• nghe rõ = hear clearly
• không rõ = unclear / not sure

So rõ is a very useful word beyond just visual clarity.

Yes. The structure is very typical:

• Triệu chứng này = noun phrase
• khá rõ = predicate adjective phrase

So the overall pattern is:

• [Noun phrase] + [degree word + adjective]

This pattern is extremely common in Vietnamese:

• Căn phòng này khá lớn. = This room is quite big.
• Bài này khá khó. = This lesson is quite difficult.
• Người đó rất tốt. = That person is very kind.

A rough pronunciation guide for English speakers:

• triệu ≈ chee-uh with a gliding sound and the nặng/ngã-like contour from the dấu nặng?
  More accurately, it is something like chyew with Vietnamese vowel quality.
• chứng ≈ choong with the ư vowel, which does not exist exactly in English
• này ≈ nye / nai with a falling tone
• khá ≈ kha with a rising tone
• rõ ≈ zaw or yaw depending on dialect, with a creaky/rising tone

A few important pronunciation notes:

1. tr in southern speech may sound closer to ch for many speakers.
2. chứng has the vowel ư, which English speakers often find difficult.
3. rõ is pronounced differently in different dialects:
   • Northern: often more like a z sound
   • Southern: often closer to y or a soft r

If you want a safer learner goal, focus on:

• getting the tones reasonably right
• keeping này, khá, and rõ distinct
• not pronouncing Vietnamese exactly like English spelling

Yes. Khá is optional.

You can say:

• Triệu chứng này rõ. = This symptom is clear.
• Triệu chứng này khá rõ. = This symptom is quite clear.
• Triệu chứng này rất rõ. = This symptom is very clear.

So khá just adds a degree.

No, that would usually sound unnatural.

In Vietnamese, when the predicate is an adjective like rõ, you normally do not use là.

Natural:

• Triệu chứng này khá rõ.

Unnatural in normal usage:

• Triệu chứng này là khá rõ.

As a rule of thumb:

• use là mainly when linking nouns or identifying/classifying something
• do not automatically translate English is as là

Yes. Triệu chứng is a common and standard word in medical contexts, so the sentence sounds natural in:

• doctor-patient conversations
• medical reports
• health articles
• formal discussion of illness

In very casual speech, people might sometimes talk more loosely depending on the symptom, but triệu chứng này khá rõ is completely normal standard Vietnamese.

Yes, in many contexts that is a very natural English translation.

Possible translations include:

• quite clear
• fairly clear
• pretty clear
• rather clear
• quite obvious

Which one is best depends on tone and context. Pretty clear sounds more conversational in English, while quite clear may sound a little more neutral or formal.