Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
van bac » van ban, van bao, van hac
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, dan cac
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
toc va » hoc va, toc ta, tuc va
cua tu » cua tuc, cua su, cua cu

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