Perhaps you should try some spelling variations:
"import duty integration through." » "import duty innovation through.", "import dutch integration through.", "import data integration through.", "import why integration through.", "import duties integration through."
"support migrant integration culture." » "support market integration culture.", "support migrant integration cultural.", "support migrant integrating culture.", "support migrant integrating cultural.", "support migrants integration culture.", "support grant integration culture.", "supporting migrants integration culture."

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: (("import duty integration through.") OR ("support migrant integration culture."))~.
• Removing quotes may allow a broader search: (( import duty integration through. ) or ( support migrant integration culture. ))~.
• Adding a wildcard symbol may retrieve word variants: (("import duty integration through.") or ("support migrant integration culture."))*.