Perhaps you should try some spelling variations:
"supply side irrigation schemes." » "supply side irrigation scheme.", "supply side irrigation systems.", "supply saline irrigation schemes.", "supply scale irrigation schemes.", "supply under irrigation schemes."
"supply burke integration series." » "supply burke integration services.", "supply burke interaction series.", "supply burke integration server.", "supply market integration series.", "supply europe integration series.", "supply fare integration series.", "supply curve integration series.", "supply curves integration series."

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

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