Perhaps you should try some spelling variations:
"pareticle acceleration" » "particles acceleration", "particle accelerations", "particle acceleraton"
"particle acceleration" » "particle accelerators"
"particle accelerator" » "particle accelerators"

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: (((("particle accelerator") OR ("particle acceleration"))) OR ("pareticle acceleration")).
• Removing quotes may allow a broader search: (((( particle accelerator ) or ( particle acceleration ))) or ( pareticle acceleration )).
• Adding a wildcard symbol may retrieve word variants: (((("particle accelerator") or ("particle acceleration"))) or ("pareticle acceleration"))*.