Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
ban thanh » ban hanh, ban hang
hang tai » hang va, dung tai
thuc ban » thuoc ban, thuc dan, thu ban
thanh ly » thanh lay, thanh ky, thanh le
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
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 ((lang xa) or (hang tai)) hoi. hieu ve tham thuc ban thanh ly cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((lang xa) OR (hang tai)) hoi. hieu ve tham thuc ban thanh ly cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((lang xa) or (hang tai)) hoi. hieu ve tham thuc ban thanh ly cua vat*.