Đừng dùng nhiều muối.

Đừng is used to make a negative command or negative suggestion. It usually means don’t.

So:

• Đừng dùng nhiều muối. = Don’t use a lot of salt.

A very common pattern is:

• đừng + verb

Examples:

• Đừng đi. = Don’t go.
• Đừng nói. = Don’t speak.
• Đừng lo. = Don’t worry.

In Vietnamese, commands often leave out the subject when it is understood from context.

So Đừng dùng nhiều muối. naturally means:

• Don’t use much salt
• Don’t use too much salt

The listener is understood automatically.

If you want, you can add the person being addressed:

• Bạn đừng dùng nhiều muối. = You, don’t use a lot of salt.
• Con đừng dùng nhiều muối. = Child, don’t use a lot of salt.
• Anh đừng dùng nhiều muối. = You, don’t use a lot of salt. (to an older male / depending on relationship)

But in everyday speech, the subject is often omitted.

Dùng means to use.

In this sentence, it refers to using salt in food, cooking, or seasoning:

• dùng muối = use salt

It is a normal, natural verb here. Depending on context, Vietnamese could also use other verbs:

• cho muối = put salt in
• nêm muối = season with salt
• bỏ muối vào = add salt in

But dùng is broad and easy to understand, so it works well in a general sentence.

In Vietnamese, quantity words like nhiều come before the noun.

So:

• nhiều muối = a lot of salt
• nhiều nước = a lot of water
• nhiều đường = a lot of sugar

This is different from some English structures, but it is completely normal in Vietnamese.

Structure:

• nhiều + noun

So in the sentence:

• dùng nhiều muối = use a lot of salt

Literally, nhiều muối means a lot of salt.

So the sentence literally is:

• Don’t use a lot of salt.

In real usage, English often translates this more naturally as:

• Don’t use too much salt.

If you want to be more explicit about too much, Vietnamese can say:

• Đừng dùng quá nhiều muối. = Don’t use too much salt.

So:

• nhiều = much / a lot
• quá nhiều = too much / excessively much

Yes, grammatically you can.

• dùng = use
• sử dụng = use

But sử dụng is usually a bit more formal or more written-sounding than dùng.

So:

• Đừng dùng nhiều muối. = more natural in everyday speech
• Đừng sử dụng nhiều muối. = correct, but slightly more formal

For daily conversation, dùng is usually the better choice.

Because muối here is being treated as a mass noun, like salt in English.

Mass nouns in Vietnamese often do not need a classifier when you are speaking generally.

So:

• nhiều muối = a lot of salt

If you were talking about a specific container or portion, then you might use a measure word:

• một gói muối = one packet of salt
• một thìa muối = one spoonful of salt
• một ít muối = a little salt

But in a general sentence like this, no classifier is needed.

A rough pronunciation guide is:

• Đừng ≈ dung (but with the Vietnamese ư vowel, which does not exist in normal English)
• dùng ≈ zoong or yoong depending on accent, with a falling tone
• nhiều ≈ nyee-oo
• muối ≈ moo-oy

A rough full approximation:

• Đừng dùng nhiều muối ≈ dung zoong nyee-oo moo-oy

A few important notes:

• đ is not regular English d; it is a firm d sound.
• d in southern Vietnamese often sounds like y, while in northern Vietnamese it is more like z.
• Tones matter a lot, especially in đừng, dùng, and muối.

Đừng dùng nhiều muối is the natural form for a negative command:

• Don’t use a lot of salt.

Không dùng nhiều muối usually does not sound like a normal command by itself. It sounds more like:

• not using a lot of salt
• does not use a lot of salt
• no use of much salt

So if you want to tell someone don’t do X, use đừng, not just không.

Compare:

• Đừng nói. = Don’t speak.
• Không nói. = not speaking / no speaking in some contexts, but not the normal direct equivalent in everyday conversation

Yes. Vietnamese often adds words to soften the command.

Common options:

• Đừng dùng nhiều muối nhé.
  = Don’t use too much salt, okay?

• Bạn đừng dùng nhiều muối nhé.
  = Please don’t use too much salt.

• Xin đừng dùng nhiều muối.
  = Please don’t use too much salt.
  This sounds more formal.

• Đừng dùng nhiều muối quá nhé.
  = Don’t use too much salt, okay?

Adding nhé often makes the sentence sound friendlier and less harsh.

Yes, it is understandable and natural enough, especially in a general sense.

But in cooking contexts, Vietnamese speakers might also say:

• Đừng cho nhiều muối. = Don’t add a lot of salt.
• Đừng nêm nhiều muối. = Don’t season with too much salt.
• Đừng bỏ nhiều muối vào. = Don’t put too much salt in.

So dùng is fine, but if the context is specifically adding salt to food, these alternatives may sound even more specific and natural.

Yes. Muối here means salt as a general substance.

It does not mean one particular piece or unit of salt. It is just the ingredient itself.

Examples:

• Tôi thích muối. = I like salt.
• Món này nhiều muối quá. = This dish has too much salt.
• Đừng dùng nhiều muối. = Don’t use a lot of salt.

So muối works like English salt as an uncountable substance noun.