Perhaps you should try some spelling variations:
giai chieu » gioi thieu, gian hieu, gia hieu
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, sinh trung
cong thanh » dong thanh, cong trinh, truong thanh
manh hung » anh huong
cua nhung » va nhung
cong tan » cong tac, cong san, cong ty
toan cao » toan ban, toan tap

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: giai chieu sach - ((manh trung) OR (manh hung)) cua nhung ((cong tan) OR (cong thanh)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giai chieu sach - ((manh trung) or (manh hung)) cua nhung ((cong tan) OR (cong thanh)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: giai chieu sach - ((manh trung) or (manh hung)) cua nhung ((cong tan) OR (cong thanh)) toan cao*.