Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
toc sach » doc sach, thuoc sach, nuoc sach
ban quan » van quan
hoc sach » hoc sinh, hoc cac, hoc anh
va doanh » van doanh, vay doanh, va danh
van cau » van dau, van hau, van chat
van cac » van hac, van bac, dan cac
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
quan te » quan he, quan ve, quang tue
toc va » hoc va, toc ta, tuc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) ky dang xa hoi. thi ((van cac) or (van cau)) toc va doanh ban quan te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky dang xa hoi. thi ((van cac) OR (van cau)) toc va doanh ban quan te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky dang xa hoi. thi ((van cac) or (van cau)) toc va doanh ban quan te*".