áp tai vào tường 
to put one’s ear to the wall [ áp ] : (1) to press (up to, against), place against, approach, get close; (2) to detain; (3) to pawn
[ tai ] : ear; mishap, accident, calamity
[ vào ] : at, on (date), in, to; to enter, go in, access
[ tường ] : (1) to know well; (2) wall
Most Common Compounds Set 1:
Most Common Compounds Set 2 :