Perhaps you should try some spelling variations:
"supply chains regulation schemes." » "supply chains regulatory schemes.", "supply chains insulation schemes.", "supply chains relocation schemes.", "supply heating regulation schemes.", "supply gas regulation schemes.", "supply crisis regulation schemes.", "supply chain regulation schemes."
"supply change irrigation scheme." » "supply change mitigation scheme.", "supply canal irrigation scheme.", "supply large irrigation scheme.", "supply change irrigation systems.", "supply charges irrigation scheme.", "supply channels irrigation scheme.", "supply chain's irrigation scheme."

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

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