Perhaps you should try some spelling variations:
"principles application" » "principles applications"
"particles accelerated" » "particles acceleration", "partially accelerated", "lattices accelerated"
"particle accelerator" » "particle acceleration"
"particle accelerators" » "particle accelerations", "particle accelerate", "particle acceleration", "particle accelerating"
"particle accelerated" » "particle acceleraton", "particle acceleration", "partially accelerated"

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 ("particles accelerated"))) OR ("principles application")))))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((( particle accelerators ) or ((((( particle accelerated ) or ( particles accelerated ))) or ( principles application )))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((("particle accelerators") or ((((("particle accelerated") or ("particles accelerated"))) or ("principles application"))))))*.