Perhaps you should try some spelling variations:
"particle accelerations" » "particle acceleration", "particles acceleration", "particle concentrations"
"particles application" » "particular application", "partial application", "principles application"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle accelerated", "particle accelerate", "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: (("particle accelerator") OR ((((("particle accelerations") OR ("particle accelerators"))) OR ("particles application")))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((((( particle accelerations ) or ( particle accelerators ))) or ( particles application )))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((((("particle accelerations") or ("particle accelerators"))) or ("particles application"))))*.