Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung xay » trong xay, trung gay, trung tam
ho chieu » theo chieu, hoc thieu, doi 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: ho chieu sang - thanh trung xay dung ((cong dan) or (cong san)) ((chan cau) OR (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung xay dung ((cong dan) OR (cong san)) ((chan cau) OR (can cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh trung xay dung ((cong dan) or (cong san)) ((chan cau) OR (can cau))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung xay dung ((cong dan) or (cong san)) ((chan cau) OR (can cau))*.