Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tran » thanh trang, thanh toan, thanh tra
tran toan » tranh toan, tran tuan, tran tan
toan tong » toan thong, toan trong, toan cong
tong cong » trong cong, cong cong, dung cong
tan than » tan thanh, ban than, tam than

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: hoc ((chieu xanh) OR (chieu sach)) - thanh tran toan tong cong ((tan than) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - thanh tran toan tong cong ((tan than) OR (tan tran)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - thanh tran toan tong cong ((tan than) OR (tan tran)) cau*.