Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
lanh manh » lanh tranh, lan anh, van manh
dung cong » dung trong
manh qua » manh quan, manh cua, danh qua
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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)) - lanh manh qua dung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu xanh)) - lanh manh qua dung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu xanh)) - lanh manh qua dung cong dan toan cau*.