Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh quang » nhanh quang, thanh quan, than quang
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
dung cong » dung trong
quang cao » nang cao, quang nam, quang cua
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) OR (chieu sach)) - ((canh tranh) or (thanh trung)) cua dung cong thanh quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - ((canh tranh) OR (thanh trung)) cua dung cong thanh quang cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sach)) - ((canh tranh) or (thanh trung)) cua dung cong thanh quang cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sach)) - ((canh tranh) or (thanh trung)) cua dung cong thanh quang cao*.