Perhaps you should try some spelling variations:
"supply factor integration theories." » "supply factor integration theory.", "supply factor integration through.", "supply factor integration efforts.", "supply facto integration theories.", "supply sector integration theories.", "supply faculty integration theories.", "supply factors integration theories.", "supply water integration theories."
"supply scale irrigation schemes." » "supply scale irrigation scheme.", "supply scale irrigation systems.", "supply case irrigation schemes.", "supply scheme irrigation schemes.", "supply social irrigation schemes."

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