Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
vat dung » van dung, viet dung, mat duong
cong san » cong tac
toan cao » toan tap
toan ban » van ban
va dung » van dung, va duong, va ung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh tung ((va dung) OR (vat dung)) cong san ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh tung ((va dung) or (vat dung)) cong san ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh tung ((va dung) or (vat dung)) cong san ((toan cao) OR (toan ban))*.