Cậu mang theo đồ ăn nhẹ để chia sẻ.

Yes. In this sentence, cậu means you.

A few important notes:

• Cậu is used in fairly informal speech.
• It is common between friends, classmates, or people of similar age.
• It is not the safest choice for strangers, older people, or formal situations.

So this sentence sounds like something you might say to a friend:

• Cậu mang theo đồ ăn nhẹ để chia sẻ.
  Bring some snacks to share.

Depending on context, Vietnamese could use other pronouns instead of cậu, such as bạn, em, anh, chị, etc.

Mang means to carry / bring.
Mang theo adds the idea of bringing something along with you.

So:

• mang = bring, carry
• mang theo = bring along, take along

In this sentence, mang theo sounds very natural because the speaker is telling someone to bring snacks with them.

Compare:

• Cậu mang đồ ăn nhẹ. = You bring snacks.
• Cậu mang theo đồ ăn nhẹ. = You bring snacks along / bring snacks with you.

Very often, theo helps emphasize that the item accompanies the person.

Đồ ăn nhẹ means snacks or light food.

Breakdown:

• đồ ăn = food, things to eat
• nhẹ = light

Together, đồ ăn nhẹ usually means snack-type food, not a full meal.

Examples could include:

• chips
• fruit
• cookies
• small finger foods

So while it is literally something like light food, the most natural English meaning is usually snacks.

Đồ is a very common word that often means thing(s), stuff, or items.

In đồ ăn:

• đồ = things/stuff
• ăn = eat

So đồ ăn literally means something like things to eat, which naturally becomes food.

This is a very common Vietnamese pattern:

• đồ uống = drinks, things to drink
• đồ chơi = toys, things to play with
• đồ dùng = items/supplies for use

So đồ ăn nhẹ is a very natural way to say snacks.

Here, để means in order to / so that.

It connects the action with its purpose:

• mang theo đồ ăn nhẹ = bring snacks
• để chia sẻ = in order to share

So the structure is:

• Verb + object + để + purpose

This is very common in Vietnamese.

Examples:

• Tôi học tiếng Việt để nói chuyện với bạn bè.
  I study Vietnamese to talk with friends.
• Cô ấy đến sớm để giúp mọi người.
  She came early to help everyone.

In your sentence, để introduces the reason or purpose for bringing the snacks.

Not necessarily. Chia sẻ means to share, and Vietnamese often leaves out information that is understood from context.

So:

• chia sẻ = share
• The object or recipient can be omitted if obvious.

In this sentence, the implied meaning is something like:

• share with everyone
• share with others
• share with the group

If you wanted to be more explicit, you could say:

• Cậu mang theo đồ ăn nhẹ để chia sẻ với mọi người.
  Bring snacks to share with everyone.

So the original sentence is natural because the listener can easily infer who the sharing is for.

By itself, it can function like either, depending on context.

Most naturally, it sounds like an instruction or suggestion:

• Bring snacks to share.

Vietnamese often does not mark commands the same way English does. A sentence with a pronoun and verb can sound directive depending on situation and tone.

So:

• neutral statement reading: You are bringing snacks to share
• more natural practical reading: Bring snacks to share

If the speaker wanted to make it softer or clearer as a suggestion/request, they might add words like:

• nhé
• nha
• đi

For example:

• Cậu mang theo đồ ăn nhẹ để chia sẻ nhé.
  Bring some snacks to share, okay?

Yes, very often.

Vietnamese frequently drops pronouns when the subject is obvious from context.

So you could say:

• Mang theo đồ ăn nhẹ để chia sẻ.

This would still be understood as:

• Bring snacks to share.

Including cậu makes the subject explicit, which can help with clarity or emphasis, but it is not always necessary in conversation.

The basic order is:

• Subject + verb + complement/object + purpose phrase

So here:

• Cậu = subject
• mang theo = verb
• đồ ăn nhẹ = object
• để chia sẻ = purpose

So the full structure is:

• Cậu | mang theo | đồ ăn nhẹ | để chia sẻ.

This is pretty similar to English:

• You | bring | snacks | to share.

That is one reason this sentence may feel relatively straightforward to English speakers.

Sometimes Vietnamese allows small shifts in word placement, but mang theo đồ ăn nhẹ is the more straightforward and natural form here.

Why?

Because mang theo works as a verb phrase meaning bring along, and then đồ ăn nhẹ follows as the object.

So this is the safest pattern:

• mang theo + object

In some contexts Vietnamese can place short particles after the object, but for a learner, mang theo đồ ăn nhẹ is the better choice.

It is natural in an informal context, especially with friends.

Tone level:

• natural for casual speech
• not formal
• not especially polite or soft
• not rude, assuming cậu is appropriate for the relationship

If you want it to sound friendlier or softer, you could add a sentence-final particle:

• Cậu mang theo đồ ăn nhẹ để chia sẻ nhé.
• Cậu mang theo đồ ăn nhẹ để chia sẻ nha.

These make it sound more like a friendly suggestion.

Yes, but the meaning becomes narrower.

• đồ ăn nhẹ = snacks in general
• bánh kẹo = cakes, candy, sweets/snack treats

So if you say:

• Cậu mang theo bánh kẹo để chia sẻ.

it sounds more like:

• Bring some sweets/snack treats to share.

If you want a broad category, đồ ăn nhẹ is better. If you specifically mean candy, cookies, or snack treats, bánh kẹo may fit better.

Yes. A few common alternatives are:

• Cậu mang ít đồ ăn vặt đến để chia sẻ nhé.
  Bring some snacks to share.
• Nhớ mang theo đồ ăn nhẹ để chia sẻ nhé.
  Remember to bring snacks to share.
• Mang chút đồ ăn nhẹ đến chia sẻ với mọi người nhé.
  Bring a few snacks to share with everyone.

These differ slightly in tone:

• ít = some, a small amount
• chút = a little, a few
• đồ ăn vặt = snack food, munchies
• nhớ = remember to

Your original sentence is already correct and natural for casual use.