lặp lại 
to repeat, reiterate [ lặp ] : iteration; to repeat
[ lại ] : (1) again; against, over again, back towards; resume, re-; (2) to come, reach, get to; (3) (indicates something is contrary to expectations)
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
lặp đi lặp lại