Bộ phim này có quỷ.

A very literal breakdown is:

• bộ phim = film, movie
• này = this
• có = has / contains / there is
• quỷ = demon, devil, evil spirit

So the sentence is literally something like:

This movie has demons
or
There is a demon in this movie

In natural English, depending on context, it could also mean:

• This movie has a demon in it.
• This movie contains demons.
• There are demons in this movie.

Vietnamese noun phrases usually work like this:

noun + demonstrative

So:

• bộ phim này = this movie
• cuốn sách này = this book
• người này = this person

That is different from English, where this comes before the noun.

So:

• English: this movie
• Vietnamese: movie this → bộ phim này

Phim by itself means film / movie.

Bộ phim is a very common way to say a movie / a film as a counted or complete work. Here, bộ is a classifier-like word often used for movies, TV series, and other extended works.

So both can refer to a movie, but:

• phim này = this movie
• bộ phim này = this movie

Both are understandable.
Bộ phim này can sound a bit more complete or formal than just phim này.

It can feel like either, depending on how you translate it.

In Bộ phim này có quỷ, có means that the movie contains or has demons in it.

So possible English translations are:

• This movie has demons.
• There are demons in this movie.

Vietnamese often uses có in ways that overlap with English have and there is/are, depending on context.

For example:

• Nhà này có chó. = This house has a dog / There is a dog in this house
• Phim này có ma. = This movie has ghosts / There are ghosts in this movie

Quỷ usually means demon, devil, or evil spirit rather than ghost.

A useful comparison:

• ma = ghost, spirit
• quỷ = demon, devil, evil spirit

So if a movie has supernatural spirits in general, learners often need to choose carefully:

• phim có ma = a movie with ghosts
• phim có quỷ = a movie with demons/devils

In some contexts, English translations may overlap a little, but quỷ is usually darker or more evil than ma.

Yes, it is understandable and natural enough, especially if you are simply saying that demons appear in the movie.

That said, native speakers might also say things like:

• Bộ phim này có ma quỷ. = This movie has ghosts and demons / evil spirits.
• Trong bộ phim này có quỷ. = There are demons in this movie.
• Bộ phim này có quỷ xuất hiện. = Demons appear in this movie.

So your sentence is fine, but in real conversation people may choose a slightly fuller version depending on what they want to emphasize.

Vietnamese nouns usually do not have singular/plural endings like English.

So quỷ can mean:

• a demon
• demons

The exact meaning comes from context.

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

• một con quỷ = one demon
• nhiều con quỷ = many demons
• các con quỷ = the demons / demons

In your sentence, Bộ phim này có quỷ, the meaning is general and could be understood as there is a demon or there are demons.

In Vietnamese, classifiers are often used when a noun is being counted or specified more exactly, but not always in broad statements.

So:

• có quỷ = has demons / there is a demon
• có một con quỷ = has one demon / there is one demon

For supernatural beings or animals, con is often used when the noun is specific or counted:

• một con ma
• một con quỷ

But in a general sentence like Bộ phim này có quỷ, leaving out the classifier is normal.

Quỷ can be tricky for English speakers.

A rough guide:

• qu in Vietnamese is pronounced more like w or kw, depending on accent and analysis
• the vowel is somewhat like uy
• the tone is hỏi, a dipping tone in Northern Vietnamese

A very rough approximation is something like wee with a dipping, questioning-like contour, but that is only approximate.

Important points:

• Do not pronounce qu like English kw too strongly.
• The ỷ part carries the tone.
• The word is short: quỷ.

If you are learning Northern pronunciation, listen carefully to native audio because the hỏi tone is especially important.

Yes. Phim này có quỷ is perfectly understandable and natural.

Comparison:

• Bộ phim này có quỷ.
• Phim này có quỷ.

Both mean basically the same thing: This movie has demons or There are demons in this movie.

Using bộ phim may sound a little more complete or slightly more formal, while phim is shorter and very common in everyday speech.

In this sentence, it most naturally means actual demons are in the movie.

But in other contexts, words involving quỷ can be figurative or expressive. Vietnamese sometimes uses quỷ in emotional or idiomatic ways, depending on the phrase.

Still, Bộ phim này có quỷ on its own will normally be understood literally:

• the movie includes a demon
• the movie includes demons
• demons appear in the movie

Both are natural, but they focus slightly differently.

• Bộ phim này có quỷ.
  = This movie has demons.

• Trong bộ phim này có quỷ.
  = In this movie, there are demons.

The version with trong explicitly says in the movie, so it can sound a little clearer if you want to emphasize location or content.

It can do either, depending on context and tone.

It could be:

• a neutral description: This movie has demons.
• a content warning: This movie contains demons.
• part of a recommendation or summary: This movie has demons in it.

Vietnamese does not need a special form here; the intended function comes from context, tone of voice, and surrounding sentences.