Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
hieu he » hieu ve, hiem he, hieu le
nang xa » nang x, lang xa, mang xa
tinh ve » trinh ve, tinh ven, dinh ve
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
ve cua » le cua, de cua, te cua
va sac » va cac, va suc, va san
sac ky » cac ky, sai ky
cua te » cua 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 sac ky ((nang xa) or (nang ma)) hoi. hieu he ((nam thuc) or (am thuc)) va tinh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va sac ky ((nang xa) OR (nang ma)) hoi. hieu he ((nam thuc) OR (am thuc)) va tinh ve cua te.
• Adding a wildcard symbol may retrieve word variants: va sac ky ((nang xa) or (nang ma)) hoi. hieu he ((nam thuc) or (am thuc)) va tinh ve cua te*.