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

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