Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nam thuoc » nam thuc, nam thu, nha thuoc
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 ((ban 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 ((ban 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 ((ban thanh) or (gia thanh)) vi cua tu*.