Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - thanh trung cua tong ((cong dan) OR (cong san)) ((chan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh trung cua tong ((cong dan) OR (cong san)) ((chan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh trung cua tong ((cong dan) OR (cong san)) ((chan cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh trung cua tong ((cong dan) OR (cong san)) ((chan cau) or (phan tu))*.