Perhaps you should try some spelling variations:
"support 2 integration theories." » "support 2 integration theorems.", "support 2 integrationstheorie 2.", "support 2 integration theory.", "support der integration theories.", "support data integration theories.", "support deep integration theories.", "support _ integration theories.", "support a integration theories.", "support 4 integration theories."
"support 3 integration schemes." » "support 3 integration schengen.", "support 3 irrigation schemes.", "support 3 integration regimes.", "support die integration schemes.", "support der integration schemes.", "support data integration schemes.", "support _ integration schemes.", "support a integration schemes.", "support 4 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 3 integration schemes.") or ("support 2 integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support 3 integration schemes.") OR ("support 2 integration theories.")).
• Removing quotes may allow a broader search: (( support 3 integration schemes. ) or ( support 2 integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support 3 integration schemes.") or ("support 2 integration theories."))*.