Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham duc » pham duc, cham soc, pham duy
va thanh » gia thanh, va tinh, le thanh
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu van
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
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: te sach tu hang xa hoi. ((hieu ve) or (hieu va)) cham duc ((va thanh) OR (ban thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu hang xa hoi. ((hieu ve) OR (hieu va)) cham duc ((va thanh) OR (ban thanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu hang xa hoi. ((hieu ve) or (hieu va)) cham duc ((va thanh) OR (ban thanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu hang xa hoi. ((hieu ve) or (hieu va)) cham duc ((va thanh) OR (ban thanh)) hai cua tre*.