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."
"support worker integrating policies." » "support worker integration policies.", "support worker integrated policies.", "support worker integrating positive.", "support market integrating policies.", "support server integrating policies.", "support water integrating policies.", "support workers integrating policies.", "support biomarker 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 ("support worker integrating policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("support worker integrating policies.")).
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( support worker integrating policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("support worker integrating policies."))*.