Perhaps you should try some spelling variations:
trung chuan » trong chuan, trung tuan, trung phan
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
chuan bang » chua bang, chuan trang, can bang
bang cong » dang cong, bang song, hang cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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) or (chieu sach)) - sinh trung chuan bang cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - sinh trung chuan bang cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - sinh trung chuan bang cong tan than cao*.