Perhaps you should try some spelling variations:
"supply from integration theory." » "supply from integration through.", "supply from information theory.", "supply from innovation theory.", "supply roma integration theory.", "supply from immigration theory.", "supply from international theory."
"support social irrigation schemes." » "support social irrigation scheme.", "support social irrigation systems.", "support local irrigation schemes.", "support scale irrigation schemes.", "support social mitigation schemes.", "supporting social irrigation schemes.", "supply social 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 from integration theory.") OR ("support social irrigation schemes."))~.
• Removing quotes may allow a broader search: (( supply from integration theory. ) or ( support social irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply from integration theory.") or ("support social irrigation schemes."))*.