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

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