Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theory.", "supply trade integration through.", "supply trade integration efforts.", "supply side integration theories.", "supply case integration theories."
"supply asset irrigation scheme." » "supply asset irrigation systems.", "supply asset liquidation scheme.", "supply asset segregation scheme.", "supply water irrigation scheme.", "supply assets irrigation scheme.", "supply aspect irrigation scheme.", "supply market 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 asset irrigation scheme.") OR ("supply trade integration theories."))~.
• Removing quotes may allow a broader search: (( supply asset irrigation scheme. ) or ( supply trade integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply asset irrigation scheme.") or ("supply trade integration theories."))*.