Perhaps you should try some spelling variations:
thanh truong » thanh thuong, thanh tung, thanh huong
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cho chieu » ho chieu, theo chieu, chon chien
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chieu sang - ((thanh truong) or (thanh trung)) cua tong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chieu sang - ((thanh truong) OR (thanh trung)) cua tong cong san van ban*.