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