Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
trang va » hang va
tran van » luan van
cong tac » cong ty
tac doan » tap doan, tan doan, thai doan
doan dau » doan dieu, phan dau, doan va

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 (chinh sach)) - hanh ((trang va) or (tran van)) nhung cong tac doan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chinh sach)) - hanh ((trang va) OR (tran van)) nhung cong tac doan dau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chinh sach)) - hanh ((trang va) or (tran van)) nhung cong tac doan dau*.