Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
doanh dan » doanh ban, doanh van, doanh doanh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
sach ky » sac ky, sach y, sach ty
toc tay » toc thai
cua te » cua tu
toc ta » toc thai

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