Perhaps you should try some spelling variations:
proceedings el » proceedings ec, proceedings etc, proceedings 2
proceedings ed » proceedings ec, proceedings 2nd, proceedings 3rd
el report » rl report, evil report, all report
ed report » d report, oecd report, need report

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( proceedings el report ) OR ( proceedings ed report ))".
• Adding a wildcard symbol may retrieve word variants: (( proceedings el report ) OR ( proceedings ed report ))*.