Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va doanh » vay doanh, va danh, hoa doanh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
dao cua » dai cua, day cua, dan cua
van cac » van hac, van cau, van bac
cac toc » cac toi, cac nuoc, cac thoi
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
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 ((ky lang) OR (ky tang)) xa hoi. hieu van cac toc ((va doanh) OR (van doanh)) dao cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky tang)) xa hoi. hieu van cac toc ((va doanh) or (van doanh)) dao cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky tang)) xa hoi. hieu van cac toc ((va doanh) or (van doanh)) dao cua te*.