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

Try widening your search to All Fields.

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