Perhaps you should try some spelling variations:
"supply trade integration theory." » "supply trade integration through.", "supply trade information theory.", "supply trade integration report.", "supply side integration theory.", "supply case integration theory."
"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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply trade integration theory.") or ("supply crowd irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theory.") OR ("supply crowd irrigation schemes."))*.
• Removing quotes may allow a broader search: (( supply trade integration theory. ) or ( supply crowd irrigation schemes. ))*.