Perhaps you should try some spelling variations:
"support a integrationstheorie 2." » "support a integrationstheorie fur.", "support a integration theories.", "support a interpretationstheorie 2.", "support der integrationstheorie 2.", "support eine integrationstheorie 2.", "support integration theories 2.", "support _ integrationstheorie 2."
"import spate irrigation scheme." » "import spate irrigation systems.", "import scale irrigation scheme.", "import water irrigation scheme.", "import surge irrigation scheme.", "import share irrigation scheme.", "import shares irrigation scheme.", "import data irrigation scheme."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("import spate irrigation scheme.") or ("support a integrationstheorie 2."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("import spate irrigation scheme.") OR ("support a integrationstheorie 2."))*.
• Removing quotes may allow a broader search: (( import spate irrigation scheme. ) or ( support a integrationstheorie 2. ))*.