Perhaps you should try some spelling variations:
"article and nuclear physical" » "article and nuclear physics", "article and nonlinear physical", "article and nuclear optical"
"particle and nuclear medical" » "particle and nuclear medicine", "particle and nuclear material"

Try widening your search to All Fields.

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 medical") OR ("article and nuclear physical")).
• Removing quotes may allow a broader search: (( particle and nuclear medical ) or ( article and nuclear physical )).
• Adding a wildcard symbol may retrieve word variants: (("particle and nuclear medical") or ("article and nuclear physical"))*.