Perhaps you should try some spelling variations:
thanh quang » nhanh quang, thanh quan, than quang
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
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 - ((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 - ((canh tranh) OR (thanh trung)) cua dung cong thanh quang cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((canh tranh) or (thanh trung)) cua dung cong thanh quang cao*.