Bộ sưu tập được bảo quản bởi bảo tàng.

Bộ sưu tập means collection.

• sưu tập = to collect / a collection
• bộ = a set, group, or whole unit of related items

In this sentence, bộ helps make sưu tập sound like a complete, countable collection, similar to saying a collection or the collection in English.

So:

• sưu tập can mean collecting or collection
• bộ sưu tập is a very common way to say a collection

For example:

• một bộ sưu tập tranh = a collection of paintings
• bộ sưu tập cổ vật = a collection of antiques

Here, được marks the sentence as passive.

So:

• Bộ sưu tập được bảo quản... = The collection is preserved / maintained...

In many Vietnamese passive sentences:

• được often introduces a passive meaning
• it can sometimes suggest a neutral or even favorable result, depending on context

In this sentence, được does not mean receive, get, or be able to. It is functioning as a passive marker.

Yes. It is a passive sentence.

The structure is:

• Bộ sưu tập = the thing affected
• được bảo quản = is preserved / is maintained
• bởi bảo tàng = by the museum

So the focus is on the collection, not on the museum.

The active version would be:

• Bảo tàng bảo quản bộ sưu tập.
• The museum preserves the collection.

Bảo quản means to preserve, to keep in good condition, to maintain carefully, or to store/protect properly.

It is often used for things that need careful handling, such as:

• artifacts
• documents
• food
• medicine
• museum objects

So in this sentence, bảo quản suggests more than just keeping the collection. It implies proper care and protection.

Compare:

• giữ = keep
• bảo quản = preserve / maintain carefully
• bảo tồn = conserve, preserve long-term, often cultural or historical things

Bởi means by, introducing the agent in a passive sentence:

• bởi bảo tàng = by the museum

This is grammatically correct, but it can sound somewhat formal or written, especially in careful or official language.

In everyday Vietnamese, the agent is often:

1. omitted, if it is obvious or unimportant
2. introduced with do instead of bởi

So you may also see:

• Bộ sưu tập được bảo quản do bảo tàng.
  This is possible, though still somewhat formal.

Very often, Vietnamese speakers would simply say:

• Bộ sưu tập được bảo quản cẩn thận.
• The collection is carefully preserved.

without mentioning who does it.

Yes, absolutely.

Vietnamese often leaves out the agent in passive sentences if it is already known or not important.

So:

• Bộ sưu tập được bảo quản.
• The collection is preserved.

This sounds natural and complete.

In fact, omitting the agent is often more common than including it.

Vietnamese does not have articles like a, an, and the in the same way English does.

So:

• bảo tàng can mean museum or the museum, depending on context

Whether it is definite or indefinite is understood from the situation.

If needed, Vietnamese can make things more specific in other ways, for example:

• bảo tàng này = this museum
• bảo tàng đó = that museum
• một bảo tàng = a museum

But in your sentence, just bảo tàng is perfectly normal.

The word order is:

• Bộ sưu tập = subject/topic
• được bảo quản = passive verb phrase
• bởi bảo tàng = agent phrase

So literally, it is something like:

• Collection + is preserved + by museum

This is fairly close to English passive structure:

• The collection is preserved by the museum.

That makes this sentence easier for English speakers than some other Vietnamese patterns.

Yes. Sưu tập can be both a verb and a noun, depending on context.

As a verb:

• Tôi sưu tập tem.
• I collect stamps.

As a noun:

• Bộ sưu tập này rất quý.
• This collection is very valuable.

In your sentence, it is part of the noun phrase bộ sưu tập, so it means collection.

No. Được is common in passive sentences, but not every passive sentence must use it, and được has other meanings too.

It can mean:

1. passive marker

   • Bộ sưu tập được bảo quản...

2. to be allowed to / can

   • Tôi được vào. = I am allowed to enter.

3. to receive / get

   • Tôi được quà. = I received a gift.
     (This depends on context and style.)

In passive sentences, được often appears when the result is neutral or positive, though this is not an absolute rule.

There is also bị, which often marks a passive with a negative meaning:

• Bộ sưu tập bị hư hại.
• The collection was damaged.

So được and bị are both important to compare.

Often, yes.

The active version:

• Bảo tàng bảo quản bộ sưu tập.

is straightforward and natural.

Vietnamese generally uses passive constructions less often than English, especially in casual speech. So while your original sentence is correct, an active sentence may sound more natural in many everyday situations.

That said, the passive is still useful when you want to focus on the collection rather than the museum.

So the choice depends on what you want to emphasize:

• Bộ sưu tập được bảo quản bởi bảo tàng.
  Focus on the collection

• Bảo tàng bảo quản bộ sưu tập.
  Focus on the museum

Yes, it sounds somewhat formal and written, especially because of:

• được in a passive structure
• bởi to mark the agent
• the verb bảo quản, which is more formal/specific than a very basic verb like giữ

This kind of sentence would fit well in:

• museum descriptions
• reports
• articles
• educational materials
• official writing

In casual conversation, speakers might choose something simpler, such as:

• Bảo tàng đang giữ bộ sưu tập này.
• The museum is keeping this collection.

or

• Bộ sưu tập này do bảo tàng quản lý.
• This collection is managed by the museum.

A learner may especially want to watch the tones in these words:

• bộ — heavy/falling tone
• sưu — level tone
• tập — heavy/falling tone
• được — falling-rising tone in Northern speech
• bảo — dipping/rising tone
• quản — dipping/rising tone
• bởi — falling-rising tone
• tàng — low falling tone

A few pronunciation tips:

• sưu tập: don’t make sưu sound like English sue; keep it as a Vietnamese vowel combination.
• bảo quản: both words have tones that need clear control.
• được: this word is very common, so it is worth practicing a lot.

If your tones are unclear, native speakers may still guess the meaning from context, but these words become much easier to understand when the tones are accurate.