Perhaps you should try some spelling variations:
"particles accelerated" » "particles acceleration", "lattices accelerated", "particle acceleraton"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"parallel acceleration" » "particle acceleration", "parallel generation", "parallel application"
"particle accelerator" » "particle accelerators", "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 accelerator") OR ((((("particles accelerated") OR ("partially accelerated"))) OR ("parallel acceleration")))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((((( particles accelerated ) or ( partially accelerated ))) or ( parallel acceleration )))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((((("particles accelerated") or ("partially accelerated"))) or ("parallel acceleration"))))*.