Perhaps you should try some spelling variations:
"particle acceleration" » "particle accelerators"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"particle accelerator" » "particle accelerators"
"particle accelerated" » "particles accelerated", "particle acceleraton", "particle accelerators", "particles acceleratedd", "particle acceleratond", "particle acceleratorsd"
"particle accelerate" » "particles accelerated", "particle acceleraton", "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 accelerate") OR ("particle acceleration"))) OR ("partially accelerated"))) OR ("particle accelerated")))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((((((( particle accelerate ) or ( particle acceleration ))) or ( partially accelerated ))) or ( particle accelerated )))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((((((("particle accelerate") or ("particle acceleration"))) or ("partially accelerated"))) or ("particle accelerated"))))*.