Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu van » thien van, lieu va, hieu ve
va doanh » van doanh, vay doanh, va danh
van cua » vang cua, ban cua, dan cua
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
tuc va » thuc va, truc va, tuc xa
te bai » te bao, te tai, te ban
te sai » te tai, te lai, te hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te bai)) ky tang ma hoa. ((hieu van) OR (hieu va)) cac tuc va doanh van cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) OR (te bai)) ky tang ma hoa. ((hieu van) or (hieu va)) cac tuc va doanh van cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sai) OR (te bai)) ky tang ma hoa. ((hieu van) or (hieu va)) cac tuc va doanh van cua tre*.