Perhaps you should try some spelling variations:
"partially accelerated" » "partially correlated", "naturally accelerate", "partially degenerate"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle accelerate", "particle acceleration", "particle accelerating"
"particle accelerated" » "particles accelerated", "particle acceleration", "particles acceleration"
"practice accelerated" » "practice accelerate", "practices accelerate", "practices 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 ((((((("particle accelerated") OR ("practice accelerated"))) OR ((("partially accelerated") OR ("partially integrated"))))) OR ("particle acceleraton")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"particle accelerator\") or (((\"particle accelerators\") or (((((((\"particle accelerated\") OR (\"practice accelerated\"))) or (((\"partially accelerated\") or (\"partially integrated\"))))) or (\"particle acceleraton\"))))))".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerators ) or ((((((( particle accelerated ) OR ( practice accelerated ))) or ((( partially accelerated ) or ( partially integrated ))))) or ( particle acceleraton )))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((("particle accelerators") or ((((((("particle accelerated") OR ("practice accelerated"))) or ((("partially accelerated") or ("partially integrated"))))) or ("particle acceleraton"))))))*.