Perhaps you should try some spelling variations:
"import data integration theories." » "import data integration theorems.", "import data integrationstheorie 2.", "import data integration theory.", "import data integrity theories.", "import duty integration theories."
"support grant integration schemes." » "support grant integration schengen.", "support grant irrigation schemes.", "support grant integration regimes.", "support migrant integration schemes.", "support migrants integration schemes.", "support statt integration schemes."

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: (("support grant integration schemes.") OR ("import data integration theories."))~.
• Removing quotes may allow a broader search: (( support grant integration schemes. ) or ( import data integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support grant integration schemes.") or ("import data integration theories."))*.