Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va thanh » ban thanh, va tinh, le thanh
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu he » hieu ve, hiem he, hieu le
va san » va ban
vi cua » vai cua, di cua
he nam » ha nam, nghe nam
san ky » sang ky, van ky, dan ky
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: va san ky ((nang xa) OR (lang xa)) hoi. hieu he nam thuoc ((va thanh) or (gia thanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va san ky ((nang xa) OR (lang xa)) hoi. hieu he nam thuoc ((va thanh) OR (gia thanh)) vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "va san ky ((nang xa) OR (lang xa)) hoi. hieu he nam thuoc ((va thanh) or (gia thanh)) vi cua tu*".