đâm sầm vào nhau 
to bump into each other [ đâm ] : to collide; to prick, stab, thrust, prick, stab
[ sầm ] : (1) dark; (2) to hit, clash, crash
[ vào ] : at, on (date), in, to; to enter, go in, access
[ nhau ] : (1) together, in company, each other; (2) placenta
Most Common Compounds Set 1:
Most Common Compounds Set 2 :