Perhaps you should try some spelling variations:
"particle and nuclear physical" » "particle and nonlinear physical", "particle and nuclear medical", "particle and nuclear optical"
"particle and nuclear material" » "particle and nuclear materials", "particle and nuclear matrix", "particle and nuclear matter"

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 and nuclear physical") OR ("particle and nuclear physics"))) OR ("particle and nuclear material")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"particle and nuclear physical\") OR (\"particle and nuclear physics\"))) or (\"particle and nuclear material\"))".
• Removing quotes may allow a broader search: (((( particle and nuclear physical ) OR ( particle and nuclear physics ))) or ( particle and nuclear material )).
• Adding a wildcard symbol may retrieve word variants: (((("particle and nuclear physical") OR ("particle and nuclear physics"))) or ("particle and nuclear material"))*.