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

Try widening your search to All Fields.

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: (("pparticle accelerations") OR ((("article accelerators") OR ("particle acceleraton")))).
• Removing quotes may allow a broader search: (( pparticle accelerations ) or ((( article accelerators ) or ( particle acceleraton )))).
• Adding a wildcard symbol may retrieve word variants: (("pparticle accelerations") or ((("article accelerators") or ("particle acceleraton"))))*.