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
cac toc » cac toi, cac nuoc, cac thoi
van cac » van hac, van cau, van bac
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
cua tuc » cua duc, cua thuoc, luat tuc
toc va » hoc va, toc ta, tuc va
cua tu » cua su, cua cu, cua te

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