Perhaps you should try some spelling variations:
"atomic nucleous" » "atomic nucleus", "atomic nuclei"
"atomic nucleic" » "atomic nuclei", "atomic nucleus", "atoms nuclei"
"atomic nuclear" » "atomic nuclei", "atomic nucleus", "atom nuclear"

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