Perhaps you should try some spelling variations:
"support drip irrigation schemes." » "support drip irrigation scheme.", "support drip irrigation systems.", "support deep irrigation schemes.", "support during irrigation schemes.", "support crops irrigation schemes."
"supply facto integration south." » "supply factor integration south.", "supply faculty integration south.", "supply sector integration south.", "supply facto integration study.", "supply facto integration some.", "supply facto integration social.", "supply factors integration south.", "supply data integration south."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support drip irrigation schemes.") or ("supply facto integration south."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support drip irrigation schemes.") OR ("supply facto integration south."))*.
• Removing quotes may allow a broader search: (( support drip irrigation schemes. ) or ( supply facto integration south. ))*.