Perhaps you should try some spelling variations:
ban thanh » ban hang
cham duc » pham duc, cham soc, pham duy
thu bang » thu ban, thu hang, chu bang
ban hanh » ban hang
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
vai cuu » vai cua
hieu va » hieu qua
bang va » hang va, ban va, trang va
cuu tre » cua tre, cau tren, cau treo
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu bang va hoi. ((hieu va) OR (lieu va)) cham duc ((ban thanh) or (ban hanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu bang va hoi. ((hieu va) OR (lieu va)) cham duc ((ban thanh) OR (ban hanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu bang va hoi. ((hieu va) OR (lieu va)) cham duc ((ban thanh) or (ban hanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach thu bang va hoi. ((hieu va) OR (lieu va)) cham duc ((ban thanh) or (ban hanh)) vai cuu tre*.