Perhaps you should try some spelling variations:
"natural sciences foundation" » "natural sciences foundations", "natural science foundation", "natural science foundation's"
"natural science foundations" » "natural science foundation", "natural science communications", "natural scientific foundations"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"natural sciences foundation\") OR (\"natural science foundations\"))".
• Removing quotes may allow a broader search: (( natural sciences foundation ) OR ( natural science foundations )).
• Adding a wildcard symbol may retrieve word variants: (("natural sciences foundation") OR ("natural science foundations"))*.