Perhaps you should try some spelling variations:
"open resources depletion" » "open resource depletion", "open resources selection", "open resources population", "ocean resources depletion", "open sources depletion", "own resources depletion", "open sourcess depletion"
"open resource selection" » "open resource allocation", "open resource reservation", "ocean resource selection", "open source selection", "open sources 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 resources depletion") OR ("open resource selection")).
• Removing quotes may allow a broader search: (( open resources depletion ) or ( open resource selection )).
• Adding a wildcard symbol may retrieve word variants: (("open resources depletion") or ("open resource selection"))*.