Perhaps you should try some spelling variations:
"open resource depletion" » "open resource description", "open reresources depletion", "open reresource repletion", "open resurface depletion", "open resources depletion", "ocean resource depletion", "open sources depletion"
"open resource selection" » "open resource allocation", "open resource reservation", "open resources selection", "ocean resource selection", "open sources selection"
"open source depletion" » "open resources depletion", "open resource repletion", "open surface depletion"

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