đánh trống lảng 
evade answering an embarrassing question by changing topics [ đánh ] : to beat, strike, hit, type, brush, play (games)
[ trống ] : (1) empty, vacant; (2) male (bird); (3) drum
[ lảng ] : (1) to sneak away; (2) absent-minded
Most Common Compounds Set 1:
Most Common Compounds Set 2 :