Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh trang » thanh trung, hanh trinh, minh trang
chong cong » cong cong, thong cong, cuong cong
cua chong » cua cong, cua chung, cua khong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (chieu xanh)) - ((hanh trang) OR (canh tranh)) cua chong cong dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - ((hanh trang) OR (canh tranh)) cua chong cong dan than man*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chieu xanh)) - ((hanh trang) OR (canh tranh)) cua chong cong dan than man*".