Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
van dung » van dong, xay dung, tin dung
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than cau » toan cau, phan cau, than cap
va dung » va duong, vat dung, 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: hoc chieu xanh - thanh trung ((va dung) OR (van dung)) ((cong ban) OR (cong san)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - thanh trung ((va dung) OR (van dung)) ((cong ban) or (cong san)) than cau~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh trung ((va dung) OR (van dung)) ((cong ban) or (cong san)) than cau*.