Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
canh manh » lanh manh, canh tranh, van manh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
tac van » tac vang, cac van, tac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu xanh)) - ((canh manh) OR (cach mang)) cua dung cong tac van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu xanh)) - ((canh manh) OR (cach mang)) cua dung cong tac van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu xanh)) - ((canh manh) OR (cach mang)) cua dung cong tac van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu xanh)) - ((canh manh) OR (cach mang)) cua dung cong tac van ban*.