Perhaps you should try some spelling variations:
"supply countries integrating social." » "supply countries integration social.", "supply cities integrating social.", "supply count integrating social.", "supplier countries integrating social.", "small countries integrating social.", "supply curves integrating social."
"supply costs immigration policies." » "supply costs immigration policy.", "supply costs migration policy.", "supply mass immigration policies.", "supply gross immigration policies.", "supply does immigration 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 costs immigration policies.") or ("supply countries integrating social."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply costs immigration policies.") OR ("supply countries integrating social.")).
• Removing quotes may allow a broader search: (( supply costs immigration policies. ) or ( supply countries integrating social. )).
• Adding a wildcard symbol may retrieve word variants: (("supply costs immigration policies.") or ("supply countries integrating social."))*.