Perhaps you should try some spelling variations:
"mineral resources" » "natural resources"
"social resources" » "digital resources", "lexical resources", "coastal resources"
"local resources" » "lexical resources", "biological resources"

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: (((("social resources") OR ("mineral resources"))) OR ("local resources")).
• Removing quotes may allow a broader search: (((( social resources ) or ( mineral resources ))) or ( local resources )).
• Adding a wildcard symbol may retrieve word variants: (((("social resources") or ("mineral resources"))) or ("local resources"))*.