Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ban hang » ngan hang
nam tuc » nam thuc, nam truc, nam thuoc
sanh ky » hanh ky, sang ky, nganh ky
so sanh » do sanh
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nam tu » nam thu, nam thuc
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, via cua, ca cua

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 ky nang ma hoi. hieu ve ((nam tuc) or (nam tu)) ((ban hanh) or (ban hang)) va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang ma hoi. hieu ve ((nam tuc) OR (nam tu)) ((ban hanh) OR (ban hang)) va cua viet.
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ma hoi. hieu ve ((nam tuc) or (nam tu)) ((ban hanh) or (ban hang)) va cua viet*.