Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
hoang van » hang va
toc sach » hoc sach, doc sach, thuoc sach
ta doanh » va doanh, te doanh, ty doanh
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
dan cua » dan ca, ban cua, dai cua
va dan » ca dan, va dao, va dau
toc ta » toc tay, toc thai
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: toc sach ky ((lang xa) OR (hoang van)) hoi. lieu va dan toc ta doanh dan cua te~.
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((lang xa) or (hoang van)) hoi. lieu va dan toc ta doanh dan cua te*.