Sản phẩm này mới.

• sản phẩm = product
• này = this
• mới = new

So the structure is literally product this new, which corresponds to This product is new in natural English.

Vietnamese often leaves out the verb to be when an adjective describes the subject.

So:

• Sản phẩm này mới = This product is new
• literally: This product new

This is very normal Vietnamese grammar.
You do not need là here.

Compare:

• Anh ấy là giáo viên. = He is a teacher.
  Here là is used before a noun.
• Anh ấy cao. = He is tall.
  Here there is no là before an adjective.

Since mới is an adjective, no là is needed.

In Vietnamese, demonstratives such as this and that usually come after the noun.

So:

• sản phẩm này = this product
• người đó = that person
• cuốn sách này = this book

This is different from English, where this comes before the noun.

Because mới is the adjective describing the subject sản phẩm này.

In this sentence:

• Sản phẩm này = the subject, this product
• mới = the description, new

So the pattern is:

• [noun phrase] + [adjective]

Examples:

• Nhà này đẹp. = This house is beautiful.
• Món ăn đó ngon. = That dish is delicious.

This is a very important word-order question.

• Sản phẩm này mới = This product is new.
• sản phẩm mới này = this new product

So:

1. này after the noun, and mới at the end

   • this is a full sentence
   • Sản phẩm này mới = This product is new

2. mới directly after the noun, then này

   • this is a noun phrase
   • sản phẩm mới này = this new product

The position of mới changes its role in the sentence.

Yes. mới has several meanings in Vietnamese depending on context.

In Sản phẩm này mới, it means new.

But in other sentences, mới can mean things like:

• just
• only then
• recently

Examples:

• Tôi mới ăn xong. = I just finished eating.
• Anh ấy mới đến. = He just arrived.

So learners need to use context to understand mới correctly.

Yes, but it sounds a bit formal or commercial.

sản phẩm is very common in:

• advertising
• business
• product descriptions
• online shopping
• packaging

In casual everyday speech, people may sometimes use other words depending on the item, such as:

• món này = this item/thing
• cái này = this one/this thing

But Sản phẩm này mới sounds perfectly natural in a store, ad, or product-related context.

No, not in this sentence.

Sản phẩm này is already correct and natural.

Vietnamese often uses classifiers, but they are not required in every noun phrase. With a word like sản phẩm, it is very normal to say simply:

• sản phẩm này = this product

You do not need something like cái here.

A rough guide is:

• Sản ≈ sahn with a dipping tone
• phẩm ≈ fuhm or phuhm with a low/heavy tone
• này ≈ nye with a falling tone
• mới ≈ muhy or moy with a rising-broken tone

A few important notes:

• ph is pronounced like English f
• nh sounds like the ny in canyon
• Vietnamese tones matter a lot, so listening to native audio is very helpful

If you want to sound natural, try to learn the whole sentence as one rhythm rather than only word by word.

The simplest negative form is:

• Sản phẩm này không mới. = This product is not new.

If you want to say it is no longer new, a more natural sentence might be:

• Sản phẩm này không còn mới. = This product is no longer new.

So:

• không mới = not new
• không còn mới = not new anymore / no longer new

A very common way is to add không at the end:

• Sản phẩm này mới không? = Is this product new?

You could also ask:

• Sản phẩm này có mới không?

Both are understandable, but with adjectives, X mới không? is very common and natural.

Yes, but the meaning changes.

• Sản phẩm này mới. = This product is new.
• Sản phẩm mới. can mean new product or, in context, The product is new

Without này, the sentence becomes less specifically this product.

Also, sản phẩm mới is very often understood as a noun phrase:

• a new product
• new product

So if you specifically want this product, keep này.

Not exactly.

• Sản phẩm này mới. = This product is new.
• Đây là sản phẩm mới. = This is a new product.

They are similar, but the focus is different:

• Sản phẩm này mới focuses on the condition/quality of a specific product: it is new
• Đây là sản phẩm mới introduces or identifies something as a new product

So they are related, but not interchangeable in every situation.