Perhaps you should try some spelling variations:
22policy research » policy research, police research, polity research
workshop papers » workshop patmos
workshop paper » workshop papm, workshop cape, workshop pap
workshop panel » workshops panels, workshop para, workshop paris

Try widening your search to All Fields.

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: %22policy research ((((workshop paper) OR (workshop papers))) OR (workshop panel))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22policy research ((((workshop paper) OR (workshop papers))) or (workshop panel))%22".
• Adding a wildcard symbol may retrieve word variants: %22policy research ((((workshop paper) OR (workshop papers))) or (workshop panel))%22*.