Perhaps you should try some spelling variations:
"supply curve integrating policies." » "supply curve international policies.", "supply curve integrating countries.", "supply curve immigration policies.", "supply market integrating policies.", "supply care integration policies.", "supply china integrating policies."
"import does migration policy." » "import does education policy.", "import mass migration policy.", "import net migration policy.", "import out migration policy.", "import duties migration policy.", "import costs migration policy.", "import taxes migration policy."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply curve integrating policies.") OR ("import does migration policy."))~.
• Removing quotes may allow a broader search: (( supply curve integrating policies. ) or ( import does migration policy. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply curve integrating policies.") or ("import does migration policy."))*.