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

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