Thay vì tự sửa chữa đường ống cấp nước, tôi đợi.

Thay vì means instead of or rather than.

In this sentence, it introduces the action that did not happen:

• Thay vì tự sửa chữa đường ống cấp nước = Instead of fixing the water supply pipe myself
• tôi đợi = I waited

A very common pattern is:

• thay vì + verb phrase, ...
• thay vì + noun phrase, ...

Examples:

• Thay vì đi bộ, tôi bắt xe buýt. = Instead of walking, I took the bus.
• Thay vì cà phê, tôi uống trà. = Instead of coffee, I drank tea.

Tự means oneself / by oneself / personally.

So:

• sửa chữa = repair
• tự sửa chữa = repair it oneself

In this sentence, tự shows that the speaker means fixing the pipe personally, not having someone else do it.

Compare:

• Tôi sửa chữa đường ống cấp nước. = I repair the water pipe.
• Tôi tự sửa chữa đường ống cấp nước. = I repair the water pipe myself.

For English speakers, tự often works like myself / yourself / himself / on one’s own, depending on context.

Yes, but the difference is small.

• sửa = fix, repair
• sửa chữa = repair, mend

In many situations, they overlap. However:

• sửa is shorter, more common in everyday speech
• sửa chữa can sound a bit more formal, careful, or written

So this sentence is correct, but in casual speech many people would simply say:

• Thay vì tự sửa đường ống cấp nước, tôi đợi.

That sounds a bit more natural in conversation.

It is a noun phrase made of several parts:

• đường ống = pipeline / piping / pipe line
• cấp nước = supply water / water supply

Together, đường ống cấp nước means water supply pipe or water supply pipeline.

A helpful way to think about Vietnamese noun phrases is that the main noun often comes first, and the words after it describe its function or type.

So here:

• đường ống = the pipe/pipeline
• cấp nước = that supplies water

In everyday speech, people might also say ống nước for a water pipe, depending on context.

Vietnamese often leaves out a subject when it is already clear from context.

So:

• Thay vì tự sửa chữa đường ống cấp nước, tôi đợi.

naturally implies:

• Thay vì tôi tự sửa chữa đường ống cấp nước, tôi đợi.

The subject of tự sửa chữa is understood to be the same I as in the main clause.

This is very normal in Vietnamese. English usually needs the subject to be clearer, but Vietnamese often relies on context.

The comma separates the introductory phrase from the main clause:

• Thay vì tự sửa chữa đường ống cấp nước, = introductory contrast phrase
• tôi đợi. = main clause

This is similar to English punctuation in sentences like:

• Instead of fixing the pipe myself, I waited.

In Vietnamese, the comma is helpful and natural here, especially because the first part is fairly long. In a very short sentence, punctuation can sometimes be more flexible, but this comma is completely standard.

Yes. Đợi can stand alone when the context makes the meaning clear.

So tôi đợi simply means:

• I waited
• or sometimes I waited around

Vietnamese does not always need to state the object of đợi if it is obvious or unimportant.

Still, some learners may feel the sentence sounds slightly incomplete because English often makes us expect something like:

• I waited for a plumber
• I waited for help
• I waited until someone came

Vietnamese is fine with leaving that unsaid.

Both đợi and chờ can mean to wait.

In many situations, they are interchangeable:

• Tôi đợi.
• Tôi chờ.

Both can mean I wait / I waited.

Very broadly:

• chờ is often a little more common in everyday speech
• đợi is also very common, but can sometimes sound slightly more literary or regional depending on the speaker and context

You do not need to worry too much at an early stage. Both are correct and useful.

It is grammatically correct, and a native speaker would understand it easily. But depending on context, a more natural everyday version might be:

• Thay vì tự sửa ống nước, tôi chờ.
• Thay vì tự sửa đường ống nước, tôi đợi.
• Thay vì tự sửa, tôi đợi thợ đến.

Why these may sound more natural:

• sửa is more conversational than sửa chữa
• ống nước is simpler and very common in speech
• adding what the person is waiting for, such as thợ (a repairman / worker), can make the sentence feel more complete

So the original sentence is fine, but it has a slightly careful, textbook-like feel.