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

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