Perhaps you should try some spelling variations:
"supply trade integration efforts." » "supply trade international efforts.", "supply trade conservation efforts.", "supply case integration efforts."
"supply school integration theory." » "supply school reintegration theory.", "supply school integrating theory.", "supply school interactions theory.", "supply school integration through.", "supply school information theory.", "supply school innovation theory.", "supplies school integration theory.", "support school integration theory.", "supply shock 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 efforts.") or ("supply school integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration efforts.") OR ("supply school integration theory.")).
• Removing quotes may allow a broader search: (( supply trade integration efforts. ) or ( supply school integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration efforts.") or ("supply school integration theory."))*.