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, tong quan
dung quan » dung quang, dung luan, luong quan
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - thanh ((((tung quan) OR (dung quan))) or (trung tuan)) dung cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh ((((tung quan) OR (dung quan))) OR (trung tuan)) dung cong tan tran tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((((tung quan) OR (dung quan))) or (trung tuan)) dung cong tan tran tap".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((((tung quan) OR (dung quan))) or (trung tuan)) dung cong tan tran tap*.