Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
van thuong » va thuong, van chuong, van phuong
hanh tram » hanh tam, hanh trang, thanh tran
van thong » van phong, va thong, van thang
cong tac » cong ty
tac hang » tac vang, bac thang, tac chong
hang dau » hang va, hang tai

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 tram ((van thong) OR (van thuong)) cong tac hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - hanh tram ((van thong) OR (van thuong)) cong tac hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - hanh tram ((van thong) OR (van thuong)) cong tac hang dau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - hanh tram ((van thong) OR (van thuong)) cong tac hang dau*.