gãi vào chỗ ngứa 
to touch the right chord [ gãi ] : to scratch
[ vào ] : at, on (date), in, to; to enter, go in, access
[ chỗ ] : place, spot, site, point, seat
[ ngứa ] : itchy; to itch
Most Common Compounds Set 1:
Most Common Compounds Set 2 :