Perhaps you should try some spelling variations:
"supply crowd conservation efforts." » "supply from conservation efforts.", "supply good conservation efforts.", "supply soil conservation efforts.", "supply growth conservation efforts.", "supply cost conservation efforts.", "supply how conservation efforts."
"support tool irrigation scheme." » "support tool irrigation systems.", "support total irrigation scheme.", "support flood irrigation scheme.", "support local irrigation scheme.", "support tools irrigation scheme.", "support from 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: (("support tool irrigation scheme.") or ("supply crowd conservation efforts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support tool irrigation scheme.") OR ("supply crowd conservation efforts.")).
• Removing quotes may allow a broader search: (( support tool irrigation scheme. ) or ( supply crowd conservation efforts. )).
• Adding a wildcard symbol may retrieve word variants: (("support tool irrigation scheme.") or ("supply crowd conservation efforts."))*.