Perhaps you should try some spelling variations:
thue thanh » hue thanh, thu thanh, thuc thanh
sanh thue » sach thue, anh thuc, sinh thuc
tham thuc » nham thuc, pham thuc, tam thuc
thanh ca » thanh cha, thanh cac, thanh ha
so sanh » do sanh
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
tai dau » tac dau, thi dau, tri dau
ca hoi » cau hoi, cua hoi, xa hoi
tai du » tai tu, tri du, tai su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh thue thanh ca hoi. hieu ve tham thuc va hanh ((tai dau) or (tai du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thue thanh ca hoi. hieu ve tham thuc va hanh ((tai dau) OR (tai du)) tren.
• Adding a wildcard symbol may retrieve word variants: so sanh thue thanh ca hoi. hieu ve tham thuc va hanh ((tai dau) or (tai du)) tren*.