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

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