Perhaps you should try some spelling variations:
"support grid integration theories." » "support grid integration theorems.", "support grid integrationstheorie 2.", "support grid integration theory.", "support agri integration theories.", "support group integration theories.", "support build 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("support grant integration schemes.") or ("support grid integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grant integration schemes.") OR ("support grid integration theories.")).
• Removing quotes may allow a broader search: (( support grant integration schemes. ) or ( support grid integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support grant integration schemes.") or ("support grid integration theories."))*.