Perhaps you should try some spelling variations:
"eines and mineral resources" » "eine and mineral resources", "einer and mineral resources", "einen and mineral resources", "eines and mineral resource", "eines and mineral ressource"
"eines and natural resources" » "eine and natural resources", "einer and natural resources", "einen and natural resources", "eines and natural resource", "eines and natural ressource"

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: "((\"eines and mineral resources\") OR (\"eines and natural resources\"))".
• Removing quotes may allow a broader search: (( eines and mineral resources ) OR ( eines and natural resources )).
• Adding a wildcard symbol may retrieve word variants: (("eines and mineral resources") OR ("eines and natural resources"))*.