Perhaps you should try some spelling variations:
"particles acceleration" » "particle accelerators", "parallel acceleration", "particles application"
"particle acceleration" » "particle accelerators"
"particle accelerator" » "particle accelerators"
"particle acceleraton" » "particle accelerations", "pareticle acceleration", "particle accelerators"
"particle accelerate" » "particles accelerated", "particle accelerators", "practice accelerate"

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