Perhaps you should try some spelling variations:
"supply chains sanitation schemes." » "supply chains sanitation systems.", "supply chains sanitation access.", "supply chains irrigation schemes.", "supply can sanitation schemes.", "supply chains innovation schemes.", "supply city sanitation schemes.", "supply chain sanitation schemes."
"supply large irrigation scheme." » "supply large irrigation systems.", "supply farm irrigation scheme.", "supply drip irrigation scheme.", "supply scale irrigation scheme.", "supply charges irrigation scheme.", "supply market irrigation scheme.", "supply curve irrigation scheme."

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 scheme.") or ("supply chains sanitation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply large irrigation scheme.") OR ("supply chains sanitation schemes.")).
• Removing quotes may allow a broader search: (( supply large irrigation scheme. ) or ( supply chains sanitation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply large irrigation scheme.") or ("supply chains sanitation schemes."))*.