Perhaps you should try some spelling variations:
"open resource depletion" » "open resource description", "open resources depletion", "open source depletion", "open sources depletion"
"ocean resource selection" » "ocean resource allocation", "ocean resource reservation", "ocean resources selection", "human resource selection"

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 depletion") OR ("ocean resource selection")).
• Removing quotes may allow a broader search: (( open resource depletion ) or ( ocean resource selection )).
• Adding a wildcard symbol may retrieve word variants: (("open resource depletion") or ("ocean resource selection"))*.