Perhaps you should try some spelling variations:
"open resources" » "ocean resources", "open sources", "own resources", "open sourcess", "non resources"
"open resource" » "ocean resource", "open sources", "non resource"
"min resource" » "non resource", "human resource", "chain resource"

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: (("open source") OR ((((("open resource") OR ("min resource"))) OR ("open resources")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"open source\") or (((((\"open resource\") OR (\"min resource\"))) or (\"open resources\"))))".
• Removing quotes may allow a broader search: (( open source ) or ((((( open resource ) OR ( min resource ))) or ( open resources )))).
• Adding a wildcard symbol may retrieve word variants: (("open source") or ((((("open resource") OR ("min resource"))) or ("open resources"))))*.