Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, ho chieu
tung quan » tuong quan, trung quan, dung quan
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
tran tap » toan tap, tran tan, tran tuan

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: doi chieu xanh - thanh ((tung quan) OR (trung tuan)) dung ((cong tan) OR (cong tac)) tran tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((tung quan) or (trung tuan)) dung ((cong tan) OR (cong tac)) tran tap~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((tung quan) or (trung tuan)) dung ((cong tan) OR (cong tac)) tran tap*.