Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
manh tran » manh toan, manh tuan, canh tranh
tuan hang » tuan hoang, tuan bang, tuan dang
tran dang » tran quang, tran hoang, tranh hang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, 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)) - manh tran ((tuan hang) or (tran dang)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - manh tran ((tuan hang) OR (tran dang)) cong tac than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sach)) - manh tran ((tuan hang) or (tran dang)) cong tac than cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sach)) - manh tran ((tuan hang) or (tran dang)) cong tac than cau*.