Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
phuong dan » phuong danh, phuong doan, huong dan
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, manh toan
toan tap » toan ban
xa dung » xa dong, va dung, a 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 sang - thanh trung ((xa dung) or (xay dung)) phuong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung ((xa dung) OR (xay dung)) phuong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung ((xa dung) or (xay dung)) phuong dan toan tap*.