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, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
vu sai » vu hai, vu san, vu dai
vi cua » vai cua, di cua
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 hoi. ((hieu ve) OR (hieu va)) 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 hoi. ((hieu ve) OR (hieu va)) nam thuoc ((ban 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 hoi. ((hieu ve) OR (hieu va)) nam thuoc ((ban thanh) or (gia thanh)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang xa hoi. ((hieu ve) OR (hieu va)) nam thuoc ((ban thanh) or (gia thanh)) vi cua tu*.