Perhaps you should try some spelling variations:
"world works discussion papers" » "world works discussion paper", "world works discussion part", "world works discussion panel", "world work discussion papers", "world words discussion papers", "world workers discussion papers", "world wars discussion papers", "world world discussion papers", "world networks discussion papers"
"world workshop session papers" » "world workshop series papers", "3rd workshop session papers", "oecd workshop session papers", "23rd workshop session papers", "world warshop session papers", "world worldhop session papers", "world networkshop session papers"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("world works discussion papers") OR ("world workshop session papers"))*.
• Removing quotes may allow a broader search: (( world works discussion papers ) or ( world workshop session papers ))*.