Nội dung này khá rõ.

A natural word-by-word breakdown is:

• nội dung = content, contents, substance
• này = this
• khá = quite, fairly, rather
• rõ = clear, clear to understand, distinct

So the structure is:

• Nội dung này = this content
• khá rõ = is quite clear

Even though the full meaning is already known, this breakdown helps show how Vietnamese builds the sentence.

In Vietnamese, demonstratives like này often come after the noun.

So:

• nội dung này = this content
• not này nội dung

This is a very common pattern in Vietnamese:

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

For an English speaker, this can feel reversed at first, because English puts this before the noun, while Vietnamese usually puts này after it.

Vietnamese often does not need a copula like is/are before adjectives.

In English, you say:

• The content is clear

In Vietnamese, you can simply say:

• Nội dung này rõ

The adjective rõ functions as the predicate, so a separate word meaning is is usually unnecessary here.

This is very common in Vietnamese:

• Trời lạnh = The weather is cold
• Cô ấy đẹp = She is beautiful
• Bài này khó = This lesson is difficult

So Nội dung này khá rõ is completely normal without là.

Khá is a degree word. Here it means something like:

• quite
• fairly
• rather

So khá rõ means quite clear or fairly clear.

It usually sounds a bit softer than rất:

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

So if someone says Nội dung này khá rõ, they are usually saying the content is clear to a good extent, but not necessarily emphasizing it as strongly as very clear.

Rõ is usually treated as an adjective meaning clear, distinct, or easy to understand, depending on context.

In Vietnamese grammar, adjectives can behave a lot like verbs in sentences, which is why rõ can stand directly after the subject:

• Nội dung này khá rõ

That is one reason English speakers sometimes hear Vietnamese adjectives described as stative verbs in this kind of structure.

In context, rõ can describe:

• something easy to understand
• something clearly expressed
• something distinct or unambiguous

So here it most naturally means the content is clear in its meaning or presentation.

They are related, but not always identical in tone or usage.

• rõ = clear, distinct
• rõ ràng = clear, obvious, explicit, unambiguous

In many contexts, they can both work:

• Nội dung này khá rõ
• Nội dung này khá rõ ràng

But rõ ràng often feels a bit more explicit or emphatic, like clearly expressed or quite obvious.

Very roughly:

• rõ can be a little shorter and more direct
• rõ ràng can sound slightly fuller or more formal in some contexts

Both are common, but rõ is perfectly natural here.

A rough pronunciation guide is:

• Nội: like noy with a heavy low tone
• dung: like zoong in the North, more like yoong in some Southern speech, with a level tone
• này: like nai with a falling tone
• khá: like kha with a rising tone
• rõ: like roh with a creaky broken-rising tone

The tones are:

• Nội = nặng tone
• dung = ngang tone
• này = huyền tone
• khá = sắc tone
• rõ = ngã tone

A very rough full approximation is:

noy zoong nai kha roh

But that does not capture the tones well, and tones matter a lot in Vietnamese. If you are practicing, it helps to learn the sentence syllable by syllable rather than relying only on English-style approximations.

Yes. Nội dung này rõ is grammatical and natural.

The difference is mainly nuance:

• Nội dung này rõ = This content is clear.
• Nội dung này khá rõ = This content is quite/fairly clear.

So khá adds a degree of moderation. It makes the statement a bit more measured.

Depending on context:

• rõ = neutral statement
• khá rõ = somewhat softened evaluation
• rất rõ = stronger praise or emphasis

Yes. Like many Vietnamese nouns, nội dung does not have to show singular/plural the way English does.

Depending on context, it can mean:

• content
• the content
• contents
• substance/material

In Nội dung này, the presence of này points to a specific piece of content, so English will usually translate it as this content or these contents, depending on context. Most often, this content is the most natural choice.

Usually, no.

For a sentence where a noun is described by an adjective, Vietnamese normally does not use là:

• Nội dung này khá rõ = natural
• Nội dung này là khá rõ = usually unnatural

Là is more commonly used when linking one noun phrase to another, like X is Y:

• Đây là giáo viên = This is a teacher.
• Nội dung này là phần giới thiệu = This content is the introduction section.

But with an adjective like rõ, you normally leave là out.

Yes, it is natural. It would be used when someone is commenting that the content is understandable or clearly presented.

For example:

• after reading a paragraph, document, or lesson
• when reviewing slides or instructions
• when discussing whether an explanation makes sense

It sounds fairly neutral and practical. It is not especially formal or especially casual. It works well in everyday speech, teaching, office communication, and written feedback.