Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sach)) - ((hanh trinh) or (hanh chinh)) cua dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - ((hanh trinh) OR (hanh chinh)) cua dung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - ((hanh trinh) or (hanh chinh)) cua dung cong tan van ban*.