Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
ban hanh » ban hang
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
cua te » cua tu
su ky » so ky, du ky, tu ky

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

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