Perhaps you should try some spelling variations:
"supply chain irrigation schemes." » "supply chain irrigation scheme.", "supply chain irrigation systems.", "supply grain irrigation schemes.", "supply change irrigation schemes.", "supply basin irrigation schemes."
"supply crowd integration theory." » "supply crowd integration through.", "supply crowd information theory.", "supply crowd innovation theory.", "supply grid integration theory.", "supply rfid integration theory.", "supply beyond integration theory.", "supply growth integration theory.", "supply cost integration theory.", "supply from integration theory."

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

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