Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
va doanh » van doanh, vay doanh, va danh
lang van » dang van, tang van, hoang van
te sach » toc sach
dan cua » dan ca, ban cua, dai cua
cac toc » cac toi, cac nuoc, cac thoi
sach ty » sach y, sach tu, sach thu
hieu va » hieu qua
lang xa » lang ha, dang xay
toc va » hoc va, toc ta, tuc va
cua te » cua tu

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