Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam tu
ban hanh » ban hang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua
cua te » cua tu
va du » va dau, va su, va tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: va du ky nang ma hoi. hieu ve ((((nam thuc) or (nam thu))) or (am thuc)) ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va du ky nang ma hoi. hieu ve ((((nam thuc) OR (nam thu))) OR (am thuc)) ban hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: va du ky nang ma hoi. hieu ve ((((nam thuc) or (nam thu))) or (am thuc)) ban hanh vi cua te*.