Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
trung hoac » trung hoc, trung hoa, trung ha
hoac thong » hoa thong, hoac khong, hoc thong
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cau » phan cau, chinh cau, nhanh cau
can cau » van cau, ban cau, ca cau

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

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