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