đi trở lại 
to go back [ đi ] : to go; (particle used to form commands, suggestions)
[ 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)
Most Common Compounds Set 1:
Most Common Compounds Set 2 :