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

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 accelerators"))) OR ("particle accelerationd"))) OR ("partially accelerated"))) OR ("particle acceleraton")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"particle accelerator\") or (((\"particle accelerate\") or (((((((((\"particle accelerated\") OR (\"particle accelerators\"))) or (\"particle accelerationd\"))) or (\"partially accelerated\"))) or (\"particle acceleraton\"))))))".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerate ) or ((((((((( particle accelerated ) OR ( particle accelerators ))) or ( particle accelerationd ))) or ( partially accelerated ))) or ( particle acceleraton )))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((("particle accelerate") or ((((((((("particle accelerated") OR ("particle accelerators"))) or ("particle accelerationd"))) or ("partially accelerated"))) or ("particle acceleraton"))))))*.