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 crowd irrigation schemes." » "supply crowd irrigation scheme.", "supply crowd irrigation systems.", "supply crop irrigation schemes.", "supply flood irrigation schemes.", "supply from irrigation schemes.", "supply growth irrigation schemes.", "supply cost irrigation schemes.", "supply how 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 trade integration theories.") OR ("supply crowd irrigation schemes."))~.
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply crowd irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("supply crowd irrigation schemes."))*.