Perhaps you should try some spelling variations:
"supply crop irrigation schemes." » "supply crop irrigation scheme.", "supply crop irrigation systems.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply canal irrigation schemes.", "supply crowd irrigation schemes.", "supply curve irrigation schemes."
"supply social integration series." » "supply global integration series.", "supply financial integration series.", "supply regional integration series.", "supply social integration theories.", "supply social integrating services.", "supply social integration schemes."

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

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