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