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

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 acceleraton") OR ("particles acceleration"))) OR ("particle accelerated")).
• Removing quotes may allow a broader search: (((( particle acceleraton ) or ( particles acceleration ))) or ( particle accelerated )).
• Adding a wildcard symbol may retrieve word variants: (((("particle acceleraton") or ("particles acceleration"))) or ("particle accelerated"))*.