Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
qua cau » quan cau, qua cac, qua ca
cau loc » hau loc, cau hoc, cau luc
va danh » va dinh, va dan, va hanh
loc va » hoc va, luc va
su van » tu van, vu van
vu va » vu van, tu va, su 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 tang xa hoi. hieu qua cau loc va danh ((vu va) OR (su van)) trien~.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu qua cau loc va danh ((vu va) or (su van)) trien*.