Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cuu tre » cua tre, cau tren, cau treo
soc ban » hoc ban, coc ban, so ban
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
dai hoi » dai hai, dai moi
tu hang » thu hang, tu hanh, tu hung
cua te » cua tu

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: te sach tu hang ((dai hoi) OR (dai hoc)). hieu van cham soc ban thanh lap ((cuu tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu hang ((dai hoi) OR (dai hoc)). hieu van cham soc ban thanh lap ((cuu tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te sach tu hang ((dai hoi) OR (dai hoc)). hieu van cham soc ban thanh lap ((cuu tre) or (cua te))*.