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 trade integrating policies." » "supply trade integration policies.", "supply trade integrated policies.", "supply trade integrating positive.", "supply true integrating policies.", "supply drama integrating policies.", "supply mode integrating policies.", "supply case integrating policies."

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 trade integrating policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("supply trade integrating policies."))*.
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply trade integrating policies. ))*.