Perhaps you should try some spelling variations:
tranh quang » tran quang, trinh quang, tinh quang
quang thong » quang phuong, quang truong, quang trung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
cong thanh » dong thanh, cong trinh, truong thanh
cong tan » cong tac, cong san, cong ty
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: doi ((chieu xanh) OR (chieu sang)) - canh tranh quang thong ((cong tan) or (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - canh tranh quang thong ((cong tan) OR (cong thanh)) than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - canh tranh quang thong ((cong tan) or (cong thanh)) than cau*".