Perhaps you should try some spelling variations:
resource software » resources software, source software, opensource software
sources software » source software, sourced software, resources software
ocean resource » ocean resources, human resource
open sources » open source, ion sources, main sources

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 sources software ) OR ( ocean resource software ))*.