Perhaps you should try some spelling variations:
"supply data integration theory." » "supply data integration through.", "supply data information theory.", "supply data integration report.", "supply trade integration theory.", "supply _ integration theory.", "supply data integrity theory.", "supply water integration theory."
"supply total irrigation scheme." » "supply total irrigation systems.", "supply local irrigation scheme.", "supply canal irrigation scheme.", "supply solar irrigation scheme.", "supply social irrigation scheme.", "supply rural irrigation scheme.", "supply cote irrigation scheme."

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 data integration theory.") OR ("supply total irrigation scheme."))~.
• Removing quotes may allow a broader search: (( supply data integration theory. ) or ( supply total irrigation scheme. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply data integration theory.") or ("supply total irrigation scheme."))*.