like: thăng trầm
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
thăng trầm * ☊ 
rise and fall, ups and downs * ☊
[ thăng ] : (1) to promote; (2) to come out of (a trance)
[ trầm ] : deep, bass, low