Perhaps you should try some spelling variations:
"support a integration theory." » "support a integration through.", "support a information theory.", "support a innovation theory.", "support 3 integration theory.", "support 2 integration theory.", "support 4 integration theory.", "support _ 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."

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

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