Perhaps you should try some spelling variations:
"particle acceleration" » "particle accelerators"
"particle accelerator" » "particle accelerators"
"particle accelerated" » "particles accelerated", "particle acceleraton", "particle accelerators"
"partially correlated" » "spatially correlated", "serially correlated", "partially connected"

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