Perhaps you should try some spelling variations:
"supply scale immigration policies." » "supply scale immigration policy.", "supply scale migration policy.", "supply scale migration policies.", "supply scale irrigation policies.", "supply race immigration policies.", "supply case immigration policies.", "supply scheme immigration policies.", "supply social immigration policies."
"support grant integration theories." » "support grant integration theory.", "support grant integration through.", "support grant integration efforts.", "support migrant integration theories.", "support trade integration theories.", "support grid integration theories."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply scale immigration policies.") or ("support grant integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply scale immigration policies.") OR ("support grant integration theories."))*.
• Removing quotes may allow a broader search: (( supply scale immigration policies. ) or ( support grant integration theories. ))*.