Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
cao xuc » cam xuc, cao duc, cao suc
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
hieu va » hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang

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