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

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