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