Perhaps you should try some spelling variations:
"supply trade integration theory." » "supply trade integration through.", "supply trade information theory.", "supply trade integration report.", "supply side integration theory."
"supply case integration theory." » "supply case integration through.", "supply case information theory.", "supply case integration report.", "supply care integration theory.", "supply fare integration theory.", "supply can integration theory.", "supply cost integration theory.", "supply chain integration theory.", "supply curve integration theory."

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

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