Perhaps you should try some spelling variations:
"particle accelerations" » "particle acceleration", "particle accelerators", "particle accelerator"
"particles acceleration" » "particle acceleration", "particle accelerator", "particle accelerators"
"article accelerators" » "particle accelerators", "particle accelerator", "particle acceleraton"

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