vô liêm sỉ 
bold-faced, brazen-faced, thick-skinned, barefaced, shameless, indecent [ vô ] : (1) in-, im-, (negative prefix); (2) in, at, on; (3) to go into, enter [= vào]
[ liêm ] : honest, forthright, straight
[ sỉ ] : (1) (at) wholesale; (2) shame; (3) tooth
Most Common Compounds Set 1:
Most Common Compounds Set 2 :