Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
trung vat » trung va, trung van, trong vat
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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: ho ((((hieu manh) OR (chieu xanh))) OR (chieu sang)) - thanh trung vat dung cong san toan cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu manh) or (chieu xanh))) or (chieu sang)) - thanh trung vat dung cong san toan cau*.