Perhaps you should try some spelling variations:
thai doanh » thai doan, trai doanh, thai danh
doanh dan » doanh ban, doanh van, doanh dao
dang van » hoang van, hang va
lang van » tang van, hoang van, giang van
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lang ha » long ha
cac toc » cac toi, cac nuoc, cac thoi
dan cua » dan ca, ban cua, dai cua
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 ha) OR (((lang van) OR (dang van)))) hoi. lieu va cac toc thai doanh dan cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((lang ha) or (((lang van) OR (dang van)))) hoi. lieu va cac toc thai doanh dan cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((lang ha) or (((lang van) OR (dang van)))) hoi. lieu va cac toc thai doanh dan cua te*.