Perhaps you should try some spelling variations:
ban thanh » ban hanh
cam thuc » am thuc, nam thuc, cam thu
ban hang » ngan hang
sach ty » sach tu, sach thu, xach tay
lang ha » long ha
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
ly cua » le cua

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