Perhaps you should try some spelling variations:
"supply chains sanitation systems." » "supply chains irrigation systems.", "supply can sanitation systems.", "supply chains innovation systems.", "supply city sanitation systems.", "supply chain sanitation systems."
"supplies annual irrigation scheme." » "supplies canal irrigation scheme.", "supplies annual variation scheme.", "supplies annual inflation scheme.", "supplies annual irrigation systems.", "suppliers annual irrigation scheme.", "supplied annual 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: (("supplies annual irrigation scheme.") or ("supply chains sanitation systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supplies annual irrigation scheme.") OR ("supply chains sanitation systems."))*.
• Removing quotes may allow a broader search: (( supplies annual irrigation scheme. ) or ( supply chains sanitation systems. ))*.