Perhaps you should try some spelling variations:
"particles acceleratedd" » "particles acceleration", "particle accelerators", "particle acceleration", "particles accelerationd", "particle acceleratord", "partially acceleratedd"
"particles accelerated" » "particles acceleration", "particle accelerator", "partially accelerated"

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