Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
sach kem » hanh kem
cac toc » cac toi, cac nuoc, cac thoi
van cac » van hac, van cau, van bac
lang xa » lang ha, dang xay, lang van
toc va » hoc va, toc ta, tuc va
ca te » cua te, ca ve, ca ke
ca me » cha me, ba me, ca ve

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 kem) OR (sach y)) lang xa hoi. hieu van cac toc va doanh dan ((ca te) OR (ca me))~.
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sach y)) lang xa hoi. hieu van cac toc va doanh dan ((ca te) or (ca me))*.