Perhaps you should try some spelling variations:
ban banh » ban anh, ban danh, ban thanh
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. ((hieu ve) or (hieu va)) cam xuc ((ban hanh) or (ban banh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. ((hieu ve) OR (hieu va)) cam xuc ((ban hanh) OR (ban banh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((hieu ve) or (hieu va)) cam xuc ((ban hanh) or (ban banh)) hai cua tre*.