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."
"supply crowd irrigation systems." » "supply crop irrigation systems.", "supply flood irrigation systems.", "supply from irrigation systems.", "supply growth irrigation systems.", "supply cost irrigation systems.", "supply how irrigation systems.", "supply crowd irrigation system."

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