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 services." » "supply trade integrated services.", "supply trade testing services.", "supply trade integrating policies.", "supply trade integration services.", "supply toward integrating services.", "supply shadow integrating services.", "supply side integrating services.", "supply case integrating services."

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 services."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply chain integration theories.\") OR (\"supply trade integrating services.\"))*".
• Removing quotes may allow a broader search: (( supply chain integration theories. ) OR ( supply trade integrating services. ))*.