Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
bien tinh » bi tinh, yen tinh, diep tinh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
cac ban » cac van, can ban, cac bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (bien tinh)) - thanh trung ((cac ban) OR (cac dan)) cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (bien tinh)) - thanh trung ((cac ban) OR (cac dan)) cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (bien tinh)) - thanh trung ((cac ban) OR (cac dan)) cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (bien tinh)) - thanh trung ((cac ban) OR (cac dan)) cong dan toan tap*.