Thẻ hành lý rơi.

• thẻ = card, tag, badge, ticket-like item
• hành lý = luggage, baggage
• rơi = to fall, to drop off, to come loose and fall

So thẻ hành lý means luggage tag or baggage tag, and the whole sentence means that the luggage tag fell.

Vietnamese usually follows Subject + Verb order, much like English.

So:

• Thẻ hành lý = the subject
• rơi = the verb

That gives:

• Thẻ hành lý rơi = The luggage tag fell

If you say Rơi thẻ hành lý, that is not the normal neutral way to say it as a complete statement. Vietnamese usually puts the thing doing the action first.

Vietnamese does not normally use articles like a, an, and the the way English does.

So thẻ hành lý can mean:

• a luggage tag
• the luggage tag
• luggage tag(s)

The exact meaning depends on context. In a real situation, listeners usually know from context whether you mean a specific tag or just a tag in general.

If you need to be more specific, Vietnamese can add other words, for example:

• một thẻ hành lý = a luggage tag
• thẻ hành lý này = this luggage tag
• thẻ hành lý đó = that luggage tag

Here rơi is intransitive, meaning the subject itself falls.

• Thẻ hành lý rơi = The luggage tag fell.

This is different from saying someone dropped it on purpose or by accident. If you want to say someone dropped the luggage tag, you would usually use another verb, such as:

• làm rơi thẻ hành lý = to drop the luggage tag / to cause it to fall

So:

• Thẻ hành lý rơi = The tag fell.
• Tôi làm rơi thẻ hành lý = I dropped the tag.

By itself, Thẻ hành lý rơi does not clearly mark tense.

Vietnamese often leaves tense unstated unless it matters. The time is understood from context.

Depending on context, it could mean something like:

• The luggage tag fell
• The luggage tag falls
• The luggage tag is falling

If you want to make the time clearer, you can add time words or aspect markers:

• Thẻ hành lý đã rơi. = The luggage tag fell / has fallen.
• Thẻ hành lý đang rơi. = The luggage tag is falling.
• Thẻ hành lý sẽ rơi. = The luggage tag will fall.

In this sentence, thẻ is itself the main noun, so no extra classifier is needed.

Vietnamese classifiers are often used when a noun is counted or specified, for example:

• một cái thẻ hành lý = one luggage tag
• hai cái thẻ hành lý = two luggage tags

But in a simple statement like Thẻ hành lý rơi, classifiers are often omitted.

Also, with some nouns like thẻ, speakers may simply use the noun directly without needing a classifier in many everyday contexts.

Yes, it functions like a noun phrase meaning luggage tag or baggage tag.

Vietnamese often builds noun phrases by putting a general noun first and a specifying noun after it:

• thẻ sinh viên = student card
• thẻ ngân hàng = bank card
• thẻ hành lý = luggage tag

So hành lý specifies what kind of thẻ it is.

Yes, but you need to be careful because English drop can correspond to different Vietnamese structures.

• rơi by itself usually means to fall
• làm rơi means to drop something, literally to make something fall

Examples:

• Điện thoại rơi. = The phone fell.
• Tôi làm rơi điện thoại. = I dropped the phone.

So in Thẻ hành lý rơi, the most natural understanding is The luggage tag fell, not Someone dropped the luggage tag.

Yes, a little. It is grammatical, but very short and context-dependent.

Vietnamese often allows short sentences when the situation is obvious. For example, if you are at the airport and notice the tag coming off a suitcase, saying Thẻ hành lý rơi is perfectly natural.

In fuller speech, you might hear:

• Thẻ hành lý bị rơi rồi. = The luggage tag has fallen off already.
• Thẻ hành lý rơi mất rồi. = The luggage tag has fallen off / gotten lost.
• Thẻ hành lý của bạn rơi rồi. = Your luggage tag fell off.

So the short version is natural, but it relies on context.

Both can involve something falling off, but they are not the same.

• rơi = fall, drop, come loose and fall
• rụng = fall off naturally, often for things like leaves, hair, teeth, flowers

For a luggage tag, rơi is the normal choice.

Examples of rụng:

• Lá rụng. = Leaves fall.
• Răng sữa rụng. = Baby teeth fall out.

So Thẻ hành lý rơi sounds normal, while Thẻ hành lý rụng would sound strange.

You can add the source or location:

• Thẻ hành lý rơi khỏi va li. = The luggage tag fell off the suitcase.
• Thẻ hành lý rơi từ va li xuống. = The luggage tag fell down from the suitcase.

If you want to be very natural in everyday speech, you might also hear:

• Thẻ hành lý bị rơi khỏi va li rồi.

That makes it clearer that the tag became detached from the suitcase.

Possibly, depending on context, because thẻ is a broad word and hành lý relates to baggage. But in many situations, thẻ hành lý most naturally refers to the luggage tag attached to baggage.

If you specifically mean the claim ticket the passenger keeps, people might say something more explicit depending on region and context, such as:

• thẻ nhận hành lý
• phiếu nhận hành lý

So Thẻ hành lý rơi most likely means The luggage tag fell, especially if talking about a suitcase.

To say it did not fall, you can use không:

• Thẻ hành lý không rơi. = The luggage tag did not fall / does not fall.

If you want to emphasize not yet, you can say:

• Thẻ hành lý chưa rơi. = The luggage tag has not fallen yet.

So the negative word depends on the meaning you want.