Perhaps you should try some spelling variations:
"support agri integration theories." » "support agri integration theorems.", "support agri integrationstheorie 2.", "support agri integration theory.", "support der integration theories.", "support iii integration theories.", "support i integration theories.", "support aging integration theories.", "support a integration theories.", "support act integration theories."
"support grid integration soziale." » "support grid integration social.", "support grant integration soziale.", "support group integration soziale.", "support build integration soziale."

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 agri integration theories.") OR ("support grid integration soziale."))~.
• Removing quotes may allow a broader search: (( support agri integration theories. ) or ( support grid integration soziale. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support agri integration theories.") or ("support grid integration soziale."))*.