Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan bang » luan nang, luan ban, luan tang
bang cong » dang cong, bang song, hang cong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu xanh)) - hanh tang luan bang cong ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu xanh)) - hanh tang luan bang cong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu xanh)) - hanh tang luan bang cong ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu xanh)) - hanh tang luan bang cong ((dan toan) OR (manh toan)) cao*.