Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
khong cong » thong cong, khong cang, chong cong
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: hoc ((dieu hanh) or (chieu xanh)) - thanh trung cua khong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (chieu xanh)) - thanh trung cua khong cong dan toan cao*.