Perhaps you should try some spelling variations:
doanh bao » doanh bat, doanh ban, doanh bac
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
lang van » dang van, tang van, hoang van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac toc » cac toi, cac thoi
bao cua » ban cua, bai cua, bao lua
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
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) OR (toc sach)) ky lang van hoi. hieu van ((cac toc) OR (cac nuoc)) va doanh bao cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky lang van hoi. hieu van ((cac toc) or (cac nuoc)) va doanh bao cua te~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky lang van hoi. hieu van ((cac toc) or (cac nuoc)) va doanh bao cua te*.