Perhaps you should try some spelling variations:
"oecd workshop discussion part" » "oecd workshop discussions part", "oecd workshop session part", "oecd workshop discussion paper", "second workshop discussion part", "2nd workshop discussion part", "3rd workshop discussion part"
"world works discussion papers" » "world works discussion paper", "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"

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 ("oecd workshop discussion part")).
• Removing quotes may allow a broader search: (( world works discussion papers ) or ( oecd workshop discussion part )).
• Adding a wildcard symbol may retrieve word variants: (("world works discussion papers") or ("oecd workshop discussion part"))*.