Perhaps you should try some spelling variations:
proceedings etc » proceedings ec, proceedings 5th, proceedings 4th
proceedings 2nd » proceedings 2000, proceedings 2001, proceedings 2003
proceedings el » proceedings ec, proceedings ed, proceedings 2

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: ((proceedings el) OR (((proceedings etc) OR (proceedings 2nd)))) report.
• Adding a wildcard symbol may retrieve word variants: ((proceedings el) or (((proceedings etc) or (proceedings 2nd)))) report*.