Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
bien tinh » bi tinh, yen tinh, diep tinh
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

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