có sự liên hệ giữa 
there is a relation between [ có ] : to be, have, exist; there is, there are
[ sự ] : deed, act, action event, occurrence, (classifier for actions, states)
[ liên ] : (1) union, connection; (2) successive, following
[ hệ ] : branch, system; generation
[ giữa ] : between, center, (in the) middle, among
Most Common Compounds Set 1:
Most Common Compounds Set 2 :