Perhaps you should try some spelling variations:
"natural sciences communications" » "natural science communications", "natural science communication", "natural science communicators"
"natural science foundation" » "natural science education", "natural science communication"

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: (("natural science foundation") OR ("natural sciences communications")).
• Removing quotes may allow a broader search: (( natural science foundation ) or ( natural sciences communications )).
• Adding a wildcard symbol may retrieve word variants: (("natural science foundation") or ("natural sciences communications"))*.