Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theory.", "supply trade integration through.", "supply trade integration efforts.", "supply side integration theories.", "supply case integration theories."
"supply facto integration schemes." » "supply facto irrigation schemes.", "supply facto integration some.", "supply factor integration schemes.", "supply faculty integration schemes.", "supply sector integration schemes.", "supply factors integration schemes.", "supply data integration schemes."

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 theories.") or ("supply facto integration schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("supply facto integration schemes.")).
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply facto integration schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("supply facto integration schemes."))*.