Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh vu » hanh vi, hanh va, hanh tu
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao
vu va » vu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((xa hoi) or (mai hoi)). hieu va cam ((xuc va) or (tuc va)) hanh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((xa hoi) OR (mai hoi)). hieu va cam ((xuc va) OR (tuc va)) hanh vu va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((xa hoi) or (mai hoi)). hieu va cam ((xuc va) or (tuc va)) hanh vu va triet*.