Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
nam thuc » nam thuoc, am thuc, nam thu
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va
va dan » ca dan, va dao, va dau
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky sang ma hoi. ((hieu ve) or (hieu van)) nam thuc ((ban hanh) or (va dan)) di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang ma hoi. ((hieu ve) OR (hieu van)) nam thuc ((ban hanh) OR (va dan)) di cua vat.
• Adding a wildcard symbol may retrieve word variants: su sac ky sang ma hoi. ((hieu ve) or (hieu van)) nam thuc ((ban hanh) or (va dan)) di cua vat*.