Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hung cong » nhung cong, hung cuong, phung cong
manh toan » thanh toan, anh tuan, tinh toan
tang dan » tang van, tang luan, tang quan
tung dan » dung dan, huong dan, trung dai
van tan » van tuan, van ban, van tai

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: doi chieu sach - hanh ((tang dan) OR (tung dan)) hung cong ((manh toan) OR (van tan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((tang dan) OR (tung dan)) hung cong ((manh toan) or (van tan)) ban~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((tang dan) OR (tung dan)) hung cong ((manh toan) or (van tan)) ban*.