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