Perhaps you should try some spelling variations:
"support large irrigation schemes." » "support large irrigation scheme.", "support large irrigation systems.", "support farm irrigation schemes.", "support drip irrigation schemes.", "support scale irrigation schemes.", "support lars irrigation schemes.", "support long irrigation schemes.", "support land irrigation schemes."
"support agent banking series." » "support agent banking services.", "support agent making series.", "support agent banking service.", "support aging banking series.", "support client banking series.", "support act banking series."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("support large irrigation schemes.") OR ("support agent banking series."))~.
• Removing quotes may allow a broader search: (( support large irrigation schemes. ) or ( support agent banking series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support large irrigation schemes.") or ("support agent banking series."))*.