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