Perhaps you should try some spelling variations:
"supply chain integration series." » "supply chain integration theories.", "supply chain integrating services.", "supply chain integration schemes.", "supply trade integration series.", "supply data integration series.", "supply grid integration series."
"support grid irrigation schemes." » "support grid irrigation scheme.", "support grid irrigation systems.", "support drip irrigation schemes.", "support syria irrigation schemes.", "support crop irrigation schemes.", "support agri irrigation schemes.", "support grant irrigation schemes.", "support group irrigation schemes."

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

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