Perhaps you should try some spelling variations:
"supply chain integration theories." » "supply chain integration theory.", "supply chain integration through.", "supply chain integration efforts.", "supply trade integration theories.", "supply data integration theories.", "supply grid integration theories."
"supply trade integrating policies." » "supply trade international policies.", "supply trade integrating countries.", "supply trade immigration policies.", "supply trade integration policies.", "supply toward integrating policies.", "supply shadow integrating policies.", "supply side integrating policies.", "supply case integrating policies."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply chain integration theories.") or ("supply trade integrating policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain integration theories.") OR ("supply trade integrating policies."))*.
• Removing quotes may allow a broader search: (( supply chain integration theories. ) or ( supply trade integrating policies. ))*.