giờ cao điểm 
peak hour, rush hour [ giờ ] : time (of the clock), hour, o’clock; now is the time (for sth)
[ cao ] : (1) tall, high; to be ~ tall, active; to excel; lofty, noble; (2) ointment
[ điểm ] : grades, marks, point
Most Common Compounds Set 1:
Most Common Compounds Set 2 :