Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
vat dung » van dung, viet dung, mat duong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((dieu hanh) or (chieu sang)) - thanh trung ((vat dung) OR (va dung)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((dieu hanh) OR (chieu sang)) - thanh trung ((vat dung) OR (va dung)) cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((dieu hanh) or (chieu sang)) - thanh trung ((vat dung) OR (va dung)) cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((dieu hanh) or (chieu sang)) - thanh trung ((vat dung) OR (va dung)) cong dan toan cau*.