Perhaps you should try some spelling variations:
"supply case integration theories." » "supply case integration theory.", "supply case integration through.", "supply case integration efforts.", "supply care integration theories.", "supply fare integration theories.", "supply can integration theories.", "supply cost integration theories.", "supply chain integration theories.", "supply curve integration theories."
"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 market 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 theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply large irrigation schemes.") OR ("supply case integration theories.")).
• Removing quotes may allow a broader search: (( supply large irrigation schemes. ) or ( supply case integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("supply large irrigation schemes.") or ("supply case integration theories."))*.