Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
thanh hoa » thanh pho
hoa luan » khoa luan, hoa quan, hoa dan
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: doc ((chieu xanh) or (chieu sach)) - thanh hoa luan chung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sach)) - thanh hoa luan chung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (chieu sach)) - thanh hoa luan chung cong dan toan cau*.