Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, dao hanh
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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 ty nang cao hoi. hieu va cao xuc ((((va hanh) OR (va danh))) OR (ban hanh)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang cao hoi. hieu va cao xuc ((((va hanh) OR (va danh))) or (ban hanh)) vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang cao hoi. hieu va cao xuc ((((va hanh) OR (va danh))) or (ban hanh)) vai cua tre*.