Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
dung cong » dung trong
trung va » truong va, trang va, trung ha
cong tac » cong ty
tac doan » tap doan, tan doan, thai doan
doan cau » toan cau, doan dau, doan cap
va dung » van dung, va duong, vat dung

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 ((chieu xanh) OR (((chieu sach) OR (chieu sang)))) - thanh trung va dung cong tac doan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (((chieu sach) OR (chieu sang)))) - thanh trung va dung cong tac doan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (((chieu sach) OR (chieu sang)))) - thanh trung va dung cong tac doan cau*.