like: phức hệ
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
phức hệ * ☊ 
complex * ☊
[ phức ] : (1) complicated, complex; (2) fragrant, flavored, sweet-smelling
[ hệ ] : branch, system; generation