chỉ trong vòng 20 năm trở lại đây 
in only the past 20 years [ chỉ ] : (1) only; (2) to lead; (3) to point, indicate, show, point out; (4) thread
[ trong ] : during; in(side), among
[ vòng ] : circle, ring, round
[ năm ] : (1) five; (2) year
[ trở ] : to return; to hamper, hinder; to turn, change
[ lại ] : (1) again; against, over again, back towards; resume, re-; (2) to come, reach, get to; (3) (indicates something is contrary to expectations)
[ đây] : here, this place, this
Most Common Compounds Set 1:
Most Common Compounds Set 2 :