Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cong quang » luong quang, thong quang, duong quang
dung cong » dung trong
tuan cao » juan cao, quang cao, thuan cam
toan cao » toan ban, toan tap
cong ha » cong hoa, dong ha, cong tac
ha dung » hai dung, kha dung, nha dung

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 xanh) or (chinh sach)) - thanh cong ha dung cong quang ((tuan cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chinh sach)) - thanh cong ha dung cong quang ((tuan cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chinh sach)) - thanh cong ha dung cong quang ((tuan cao) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chinh sach)) - thanh cong ha dung cong quang ((tuan cao) OR (toan cao))*.