Perhaps you should try some spelling variations:
"particle accelerators" » "particle accelerations", "particle acceleration", "particle accelerate", "particle accelerating"
"particle accelerator" » "particle acceleration"
"particle accelerated" » "particles accelerated", "particle acceleration", "partially accelerated"
"particle acceleraton" » "particle acceleration", "particles acceleration", "particle accelerations"

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