Nhờ khu bán hoang dã mà nó khỏe.

It means thanks to ... , ... or because of ... , ... with a usually positive result.

So in Nhờ khu bán hoang dã mà nó khỏe, the first part gives the cause, and the second part gives the result:

• Nhờ khu bán hoang dã = thanks to the semi-wild area/environment
• mà nó khỏe = it/he/she is healthy

This pattern is very common in Vietnamese.

Not exactly.

• nhờ usually suggests a helpful or beneficial cause: thanks to
• vì is more neutral: because
• do is also often used for cause, sometimes in more formal contexts

So nhờ fits well if the cause is something good. If the cause is bad, nhờ usually sounds wrong.

For example:

• Nhờ tập thể dục mà nó khỏe. = Thanks to exercise, it is healthy.
• Vì trời mưa nên nó ở nhà. = Because it rained, it stayed home.

khu means area, zone, section, region.

bán hoang dã means semi-wild or partly wild.

So khu bán hoang dã means something like:

• a semi-wild area
• a semi-wild zone
• a semi-wild habitat/environment

Depending on context, it could refer to a special enclosure, reserve, or habitat where an animal lives in conditions closer to nature.

No.

In this sentence, bán does not mean to sell. Here it is a Sino-Vietnamese element meaning half- or semi-.

So:

• bán hoang dã = semi-wild
• bán đảo = peninsula
• bán nguyệt = semicircle / crescent-like

Even though it is written the same way as bán meaning sell, the meaning here is completely different.

Because in Vietnamese, descriptive words usually come after the noun.

So:

• khu = area
• khu bán hoang dã = semi-wild area

This is a normal Vietnamese word order. English often puts the description before the noun, but Vietnamese usually puts it after.

nó can mean:

• it
• he
• she

The exact meaning depends on context.

Most often, nó is used for:

• animals
• children
• someone already established in context
• sometimes objects

Be careful: for an adult person, nó can sound rude or dismissive unless the relationship and context make it natural.

In a sentence like this, nó very likely refers to an animal.

khỏe means healthy, well, or strong.

It can describe:

• physical health
• strength
• general good condition

In Vietnamese, words like khỏe often work like adjectives in English, but they can also function like stative verbs. So nó khỏe literally means it is healthy / it is well.

Here, mà is part of the pattern nhờ ... mà ....

It links the cause and the result:

• Nhờ X mà Y = Thanks to X, Y

In this sentence, mà does not mean but. Vietnamese mà has several uses, and this is one of them.

You may sometimes hear shorter sentences without mà, but with nhờ, keeping mà makes the structure very clear and natural.

It is understandable, but it feels a little compressed.

A native speaker might more naturally say:

• Nhờ sống trong khu bán hoang dã mà nó khỏe.
  = Thanks to living in a semi-wild area, it is healthy.

or

• Nhờ ở khu bán hoang dã mà nó khỏe.
  = Thanks to being in a semi-wild area, it is healthy.

Why? Because the real cause is probably not just the area itself, but living in or being raised in that environment.

So the original sentence is possible, but in many contexts a version with sống trong, ở, or được nuôi trong would sound more explicit and natural.

Yes.

A very natural alternative is:

• Nó khỏe nhờ khu bán hoang dã.

This puts the result first and the cause after it. Vietnamese allows both patterns:

• Nhờ X mà Y
• Y nhờ X

Both are common. The first one emphasizes the cause a bit more clearly.