Perhaps you should try some spelling variations:
particle accelerations » particle acceleration, particles acceleration, particle concentrations
partially accelerated » partially correlated, partially integrated, naturally accelerate
particle accelerator » particle acceleration
particle accelerated » particles accelerated, particle acceleration, practice accelerated
particle acceleraton » particle acceleration, particles acceleration, pareticle acceleration
particle accelerate » particles accelerated, particle acceleration, practice accelerate
accelerators » acceleration, accelerating

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 accelerate\") or (((((\"((particle accelerated) OR (particle accelerators))\") or (\"partially accelerated\"))) or (\"((particle acceleraton) OR (particle accelerations))\"))))))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"particle accelerator\\") or (((\\"particle accelerate\\") or (((((\\"((particle accelerated) or (particle accelerators))\\") or (\\"partially accelerated\\"))) or (\\"((particle acceleraton) OR (particle accelerations))\\"))))))\"".
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerate ) or ((((( ((particle accelerated) or (particle accelerators)) ) or ( partially accelerated ))) or ( ((particle acceleraton) OR (particle accelerations)) )))))).