Perhaps you should try some spelling variations:
"pareticle acceleration" » "particles acceleration", "particle accelerations", "particle acceleraton"
"particle acceleration" » "particle accelerators"
"particles accelerated" » "particles acceleration", "partially accelerated", "lattices accelerated"
"particle accelerator" » "particle accelerators"
"particle accelerate" » "particle acceleraton", "particle accelerators", "practice accelerate"

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