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