Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theorems.", "supply trade integrationstheorie 2.", "supply trade integration theory.", "supply case integration theories."
"supply faculty integration schemes." » "supply facto integration schemes.", "supply family integration schemes.", "supply factor integration schemes.", "supply faculty integration schengen.", "supply faculty irrigation schemes.", "supply faculty integration regimes.", "supply facility integration schemes.", "supply adults 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 faculty integration schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("supply faculty integration schemes.")).
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply faculty integration schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("supply faculty integration schemes."))*.