Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu xang » thu bang, thu dang, thu sang
thanh ly » thanh lay, thanh ky, thanh le
thu hang » thi hang, thuc hanh, thu huong
tu sach » thu sach, su sach, te sach
cam tuc » cam xuc, cam tu, nam thuc
hoa hoi » khoa hoi, hoa hoc, hoc hoi
tuc ban » thuc ban, truc ban, tu ban
hoa doi » hoa dai, hoc doi, xoa doi
hieu ve » hieu va, hieu van
ly cua » le cua
ve cam » ve cham, ve cac, va cam

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 ((thu xang) or (thu hang)) ((hoa hoi) OR (hoa doi)). hieu ve cam tuc ban thanh ly cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu xang) OR (thu hang)) ((hoa hoi) OR (hoa doi)). hieu ve cam tuc ban thanh ly cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu xang) or (thu hang)) ((hoa hoi) OR (hoa doi)). hieu ve cam tuc ban thanh ly cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu xang) or (thu hang)) ((hoa hoi) OR (hoa doi)). hieu ve cam tuc ban thanh ly cua vat*.