Perhaps you should try some spelling variations:
"supply country's integration policies." » "supply countries integration policies.", "supply countries integrating policies.", "supply country integrated policies.", "supply country's immigration policies.", "supply country's international policies.", "supply country's migration policies.", "supply contracts integration policies.", "supply contract integration policies."
"supply trade information theory." » "supply price information theory.", "supply private information theory.", "supply trade integration theory.", "supply case information 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 country's integration policies.") or ("supply trade information theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply country's integration policies.") OR ("supply trade information theory.")).
• Removing quotes may allow a broader search: (( supply country's integration policies. ) or ( supply trade information theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply country's integration policies.") or ("supply trade information theory."))*.