Perhaps you should try some spelling variations:
"supply case integration theory." » "supply case integration through.", "supply case information theory.", "supply case innovation theory.", "supply care integration theory.", "supply scale integration theory.", "supply based integration theory.", "supply cost integration theory.", "supply chain integration theory.", "supply curve integration theory."
"supply large irrigation schemes." » "supply large irrigation scheme.", "supply large irrigation systems.", "supply farm irrigation schemes.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply charges irrigation schemes.", "supply targets irrigation schemes.", "supply curve 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 large irrigation schemes.") or ("supply case integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply large irrigation schemes.") OR ("supply case integration theory.")).
• Removing quotes may allow a broader search: (( supply large irrigation schemes. ) or ( supply case integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply large irrigation schemes.") or ("supply case integration theory."))*.