like: chín tầng trời
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
chín tầng trời * ☊ 
the nine levels of heaven * ☊
[ chín ] : nine
[ tầng ] : story, floor layer, stratum, stage (of a rocket)
[ trời ] : heaven, sky; area, region, sphere
[ trời ] : heaven