Perhaps you should try some spelling variations:
"particles acceleration" » "particle acceleration", "parallel acceleration", "particles application"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle accelerate", "particle accelerating"
"particle accelerated" » "particles accelerated", "particle acceleration", "particle accelerations"
"practice accelerated" » "practice accelerate", "practices accelerate", "practices accelerating"
"particle acceleraton" » "particle acceleration", "particle accelerations", "pareticle 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 accelerators") OR ((((((("particle accelerated") OR ("practice accelerated"))) OR ("partially accelerated"))) OR ((("particle acceleraton") OR ("particles acceleration"))))))))*.
• 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 (((\"particle acceleraton\") or (\"particles acceleration\"))))))))*".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerators ) or ((((((( particle accelerated ) OR ( practice accelerated ))) or ( partially accelerated ))) or ((( particle acceleraton ) or ( particles acceleration ))))))))*.