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

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