Perhaps you should try some spelling variations:
"supply chain integration schemes." » "supply chain integration some.", "supply chain integration theories.", "supply trade integration schemes.", "supply data integration schemes.", "supply grid integration schemes."
"Supply surface irrigation schemes." » "Supply scale irrigation schemes.", "Supply surface irrigation scheme.", "Supply surface irrigation systems."
supply surface » supply service

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 chain integration schemes.") or ("Supply surface irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain integration schemes.") OR ("Supply surface irrigation schemes.")).
• Removing quotes may allow a broader search: (( supply chain integration schemes. ) or ( Supply surface irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply chain integration schemes.") or ("Supply surface irrigation schemes."))*.