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 ve » hieu va, hieu van
vu sai » vu hai, vu san, vu dai
vi cua » vai cua, di cua
ve nam » he nam, va nam, le nam
sai ky » sac 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: vu sai ky ((nang xa) OR (lang xa)) hoi. hieu ve nam thuoc ((va thanh) or (gia thanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky ((nang xa) OR (lang xa)) hoi. hieu ve nam thuoc ((va thanh) OR (gia thanh)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sai ky ((nang xa) OR (lang xa)) hoi. hieu ve nam thuoc ((va thanh) or (gia thanh)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: vu sai ky ((nang xa) OR (lang xa)) hoi. hieu ve nam thuoc ((va thanh) or (gia thanh)) vi cua tu*.