Perhaps you should try some spelling variations:
"supply canal irrigation schemes." » "supply canal irrigation scheme.", "supply canal irrigation systems.", "supply scale irrigation schemes.", "supply annual irrigation schemes.", "supply rural irrigation schemes.", "supply data irrigation schemes."
"supply case integration series." » "supply case integration theories.", "supply case integrating services.", "supply case integration schemes.", "supply care integration series.", "supply fare integration series.", "supply can integration series.", "supply cost integration series.", "supply chain integration series.", "supply curve integration series."

Try widening your search to All Fields.

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

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