Perhaps you should try some spelling variations:
"pareticle acceleration" » "particle acceleration", "particles acceleration", "particle accelerators"
"particle accelerations" » "particle acceleration", "particle accelerators", "particles acceleration"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"particle accelerator" » "particle accelerators", "particle acceleration"
"particle accelerated" » "particles accelerated", "particle accelerators", "particle acceleration", "particles acceleratedd", "particle acceleratorsd", "particle accelerationd"
"particle acceleraton" » "particle acceleration", "particles acceleration", "particle accelerators"
"particle accelerate" » "particles accelerated", "particle accelerators", "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 accelerator") OR ((("particle accelerate") OR ((((((("particle accelerated") OR ("particle accelerations"))) OR ("partially accelerated"))) OR ((("particle acceleraton") OR ("pareticle acceleration")))))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"particle accelerator\") or (((\"particle accelerate\") or (((((((\"particle accelerated\") or (\"particle accelerations\"))) or (\"partially accelerated\"))) or (((\"particle acceleraton\") OR (\"pareticle acceleration\"))))))))".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerate ) or ((((((( particle accelerated ) or ( particle accelerations ))) or ( partially accelerated ))) or ((( particle acceleraton ) OR ( pareticle acceleration )))))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((("particle accelerate") or ((((((("particle accelerated") or ("particle accelerations"))) or ("partially accelerated"))) or ((("particle acceleraton") OR ("pareticle acceleration"))))))))*.