Perhaps you should try some spelling variations:
"supply case integration theory." » "supply case integration through.", "supply case information theory.", "supply case innovation theory.", "supply care integration theory.", "supply scale integration theory.", "supply based integration theory.", "supply cost integration theory.", "supply chain integration theory.", "supply curve integration theory."
"supply spate irrigation schemes." » "supply spate irrigation scheme.", "supply spate irrigation systems.", "supply scale irrigation schemes.", "supply water irrigation schemes.", "supply surge irrigation schemes.", "supply system irrigation schemes.", "supply side irrigation schemes."

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