Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
toc va » hoc va, toc ta, tuc va
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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 sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cac toc va doanh van ((cua te) OR (cua cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cac toc va doanh van ((cua te) or (cua cu))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. ((hieu va) OR (hieu qua)) cac toc va doanh van ((cua te) or (cua cu))*.