ở vào giữa lớp tuổi 20 
in one’s 20’s [ ở ] : to live, be, stay, remain; in, at
[ vào ] : at, on (date), in, to; to enter, go in, access
[ giữa ] : between, center, (in the) middle, among
[ lớp ] : (1) class, grade, rank, layer, bed; (2) classroom
[ tuổi ] : age, year of age
Most Common Compounds Set 1:
Most Common Compounds Set 2 :