Perhaps you should try some spelling variations:
"supply costs mitigation schemes." » "supply costs irrigation schemes.", "supply costs integration schemes.", "supply costs irrigation scheme.", "supply cost mitigation schemes.", "supply crises mitigation schemes.", "supply its mitigation schemes."
"supply grid integration theory." » "supply grid integration through.", "supply grid information theory.", "supply grid integration report.", "supply trade integration theory.", "supply _ integration theory.", "supply data integration theory.", "supply crowd integration theory.", "support grid integration theory."

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: (("supply costs mitigation schemes.") OR ("supply grid integration theory."))~.
• Removing quotes may allow a broader search: (( supply costs mitigation schemes. ) or ( supply grid integration theory. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply costs mitigation schemes.") or ("supply grid integration theory."))*.