Perhaps you should try some spelling variations:
"support data irrigation schemes." » "support data irrigation scheme.", "support data irrigation systems.", "support delta irrigation schemes.", "support canal irrigation schemes.", "support water irrigation schemes.", "support a irrigation schemes.", "support de irrigation schemes."
"supply social integration series." » "supply global integration series.", "supply financial integration series.", "supply regional integration series.", "supply social integration services.", "supply social interaction series.", "supply social integration server."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support data irrigation schemes.\") OR (\"supply social integration series.\"))~".
• Removing quotes may allow a broader search: (( support data irrigation schemes. ) OR ( supply social integration series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support data irrigation schemes.") OR ("supply social integration series."))*.