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