Perhaps you should try some spelling variations:
"supply tool irrigation schemes." » "supply tool irrigation scheme.", "supply tool irrigation systems.", "supply total irrigation schemes.", "supply flood irrigation schemes.", "supply local irrigation schemes.", "supply school irrigation schemes.", "support tool irrigation schemes.", "supply donor irrigation schemes."
"supply crowd sanitation services." » "supply good sanitation services.", "supply food sanitation services.", "supply town sanitation services.", "supply growth sanitation services.", "supply cost sanitation services.", "supply from sanitation services."

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