Perhaps you should try some spelling variations:
particles acceleratedd » particles acceleration, particle accelerators, particle acceleration
particles accelerated » particles acceleration, partially accelerated, lattices accelerated
particle accelerator » particle accelerators, 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 ((( particles accelerated ) OR ( particles acceleratedd )))).
• Adding a wildcard symbol may retrieve word variants: (( particle accelerator ) or ((( particles accelerated ) or ( particles acceleratedd ))))*.