Perhaps you should try some spelling variations:
resources software » source software, outsourced software, measures software
resource software » source software, opensource software, resonance software
ocean resources » human resources
open resource » open resources, ocean resource, open source

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 resource software ) OR ( ocean resources software )).
• Adding a wildcard symbol may retrieve word variants: (( open resource software ) or ( ocean resources software ))*.