Perhaps you should try some spelling variations:
"support fare integration theories." » "support fare integration theory.", "support fare integration through.", "support fare integration reforms.", "support market integration theories.", "support trade integration theories.", "support data integration theories.", "support falls integration theories.", "support state integration theories."
"supply chain integration efforts." » "supply chain international efforts.", "supply chain conservation efforts.", "supply trade integration efforts.", "supply data integration efforts.", "supply grid integration efforts."

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 chain integration efforts.") OR ("support fare integration theories."))~.
• Removing quotes may allow a broader search: (( supply chain integration efforts. ) or ( support fare integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply chain integration efforts.") or ("support fare integration theories."))*.