Perhaps you should try some spelling variations:
"particles acceleration" » "particle acceleration", "particles application", "particles preparation"
"partially accelerated" » "partially correlated", "partially integrated", "naturally accelerate"
"parallel acceleration" » "particle acceleration", "parallel generation", "parallel application"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle accelerate", "particle accelerating"
"particle accelerated" » "particles accelerated", "particle acceleraton", "particle 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 ("partially accelerated"))) OR ((("particles acceleration") OR ("parallel acceleration"))))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"particle accelerator\") or (((\"particle accelerators\") or (((((\"particle accelerated\") or (\"partially accelerated\"))) or (((\"particles acceleration\") OR (\"parallel acceleration\"))))))))*".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerators ) or ((((( particle accelerated ) or ( partially accelerated ))) or ((( particles acceleration ) OR ( parallel acceleration ))))))))*.