Perhaps you should try some spelling variations:
"particle accelerating" » "particle accelerations", "particle acceleraton", "particles acceleration"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"particle accelerators" » "particle accelerate"

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 acceleration"))) OR ((((("particle accelerators") OR ("particle accelerating"))) OR ("partially accelerated")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"particle accelerator\") or (\"particle acceleration\"))) or (((((\"particle accelerators\") OR (\"particle accelerating\"))) or (\"partially accelerated\"))))".
• Removing quotes may allow a broader search: (((( particle accelerator ) or ( particle acceleration ))) or ((((( particle accelerators ) OR ( particle accelerating ))) or ( partially accelerated )))).
• Adding a wildcard symbol may retrieve word variants: (((("particle accelerator") or ("particle acceleration"))) or ((((("particle accelerators") OR ("particle accelerating"))) or ("partially accelerated"))))*.