Perhaps you should try some spelling variations:
"supply content integration theory." » "supply continental integration theory.", "supply connectes integration theory.", "supply content moderation theory.", "supply content integration through.", "supply content information theory.", "supply content innovation theory.", "supply contract integration theory.", "supply cote integration theory.", "supply current integration theory."
"supply trade integration theory." » "supply trade integration through.", "supply trade information theory.", "supply trade innovation theory.", "supply case 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 content integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theory.") OR ("supply content integration theory."))*.
• Removing quotes may allow a broader search: (( supply trade integration theory. ) or ( supply content integration theory. ))*.