Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
cuu phuong » cac phuong, thu phuong
cua huong » cua phuong, cua thuong, cua truong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh trung ((cua huong) or (cuu phuong)) cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh trung ((cua huong) OR (cuu phuong)) cong san toan cao*.