Perhaps you should try some spelling variations:
"support grant integration theories." » "support grant integration theorems.", "support grant integrationstheorie 2.", "support grant integration theory.", "support migrant integration theories.", "support migrants integration theories.", "support statt integration theories."
"support grid integration schemes." » "support grid integration schengen.", "support grid irrigation schemes.", "support grid integration regimes.", "support agri integration schemes.", "support group integration schemes.", "support build 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 theories.") OR ("support grid integration schemes."))~.
• Removing quotes may allow a broader search: (( support grant integration theories. ) or ( support grid integration schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support grant integration theories.") or ("support grid integration schemes."))*.