vs 

QUICK ANSWER
"Buenas noches" is a form of "buenas noches", a phrase which is often translated as "good evening". "Que tengas dulces sueños" is a phrase which is often translated as "have sweet dreams". Learn more about the difference between "buenas noches" and "que tengas dulces sueños" below.
buenas noches(
bweh
-
nahs
 
noh
-
chehs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. good evening
Buenas noches y bienvenidos.Good evening and welcome.
a. good night
Me voy a dormir. ¡Buenas noches!I'm going to sleep. Good night!
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que tengas dulces sueños(
keh
 
tehng
-
gahs
 
dool
-
sehs
 
sweh
-
nyohs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
1.
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
(informal)
(singular)
a. have sweet dreams
Que tengas dulces sueños. - Gracias, amor, tú también.Have sweet dreams. - Thanks, love, and you too.
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