Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
danh vi » hanh vi, dinh vi, danh di
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((xa hoi) OR (ma hoa)). hieu van cam ((xuc va) OR (luc va)) danh vi va triet~.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((xa hoi) or (ma hoa)). hieu van cam ((xuc va) or (luc va)) danh vi va triet*.