Perhaps you should try some spelling variations:
"particle and nuclear physical" » "particle and nuclear physics", "particle and nonlinear physical", "particle and nuclear optical"
"article and nuclear medical" » "article and nuclear medicine", "article 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 physical") OR ("article and nuclear medical")).
• Removing quotes may allow a broader search: (( particle and nuclear physical ) or ( article and nuclear medical )).
• Adding a wildcard symbol may retrieve word variants: (("particle and nuclear physical") or ("article and nuclear medical"))*.