Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung quan » truong quan, trong quan, trung tuan
quan nhung » qua nhung, cua nhung, luan chung
cuong bang » cong bang, tuong bang, phuong bang
muong bang » muong sang, tuong bang, phuong bang
khan cap » khan ap, than cap, khoan cam

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 (chieu sach)) - thanh trung quan nhung ((cuong bang) OR (muong bang)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh trung quan nhung ((cuong bang) OR (muong bang)) khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - thanh trung quan nhung ((cuong bang) OR (muong bang)) khan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - thanh trung quan nhung ((cuong bang) OR (muong bang)) khan cap*.