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

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