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

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