Perhaps you should try some spelling variations:
"supply grid integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply grid integrationstheorie fur.", "supply grid integration theories.", "supply grid interpretationstheorie 2.", "supply crowd integrationstheorie 2.", "supply great integrationstheorie 2.", "support grid integrationstheorie 2."
"supply scale irrigation schemes." » "supply scale irrigation scheme.", "supply scale irrigation systems.", "supply case irrigation schemes.", "supply scheme irrigation schemes.", "supply social irrigation schemes."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply scale irrigation schemes.") or ("supply grid integrationstheorie 2."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply scale irrigation schemes.") OR ("supply grid integrationstheorie 2.")).
• Removing quotes may allow a broader search: (( supply scale irrigation schemes. ) or ( supply grid integrationstheorie 2. )).
• Adding a wildcard symbol may retrieve word variants: (("supply scale irrigation schemes.") or ("supply grid integrationstheorie 2."))*.