Perhaps you should try some spelling variations:
discussion panel » discussion paper, discussion part
research center » research chapter
itf joint » 4th joint, 8th joint, csf joint
7th joint » 4th joint

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: oecd/((itf joint) OR (7th joint)) transform ((research centre) OR (research center)) discussion panel.
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd/((itf joint) OR (7th joint)) transform ((research centre) or (research center)) discussion panel".
• Adding a wildcard symbol may retrieve word variants: oecd/((itf joint) OR (7th joint)) transform ((research centre) or (research center)) discussion panel*.