Perhaps you should try some spelling variations:
vu sach » vu bach, vu khach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su sach » so sach
ve cao » va cao, ve bao, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ky tang xa hoi. hieu ve cao duc ((va hanh) or (va danh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky tang xa hoi. hieu ve cao duc ((va hanh) OR (va danh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky tang xa hoi. hieu ve cao duc ((va hanh) or (va danh)) vai cua tre*.