Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh le » thinh le, thanh ve, thanh de
thuc ban » thuoc ban, thuc dan, thu ban
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
le cua » ly cua
ve nam » he nam, va nam, le nam
ha hoi » hoa hoi, xa hoi, va hoi

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