Perhaps you should try some spelling variations:
"support deep integration theory." » "support deep integration through.", "support deep information theory.", "support deep innovation theory.", "support data integration theory.", "supported deep integration theory.", "support de integration theory.", "support does integration theory."
"support grant irrigation schemes." » "support grant irrigation scheme.", "support grant irrigation systems.", "support grain irrigation schemes.", "support gray irrigation schemes.", "support gravity 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 deep integration theory.") or ("support grant irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support deep integration theory.") OR ("support grant irrigation schemes."))*.
• Removing quotes may allow a broader search: (( support deep integration theory. ) or ( support grant irrigation schemes. ))*.