Perhaps you should try some spelling variations:
"supply data integration theories." » "supply data integration theory.", "supply data integration through.", "supply data integration efforts.", "supply trade integration theories.", "supply _ integration theories.", "supply data integrity theories.", "supply water integration theories."
"supply crowd irrigation scheme." » "supply crowd irrigation systems.", "supply crop irrigation scheme.", "supply flood irrigation scheme.", "supply from irrigation scheme.", "supply growth irrigation scheme.", "supply cost irrigation scheme.", "supply how irrigation scheme."

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

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