Perhaps you should try some spelling variations:
"supply chain intermediation theory." » "supply chain introduction theory.", "supply chain determination theory.", "supply chain integration theory.", "supply chain intermediaries theory.", "supply credit intermediation theory.", "supply bank intermediation theory."
"support agri information theory." » "support fmri information theory.", "support grid information theory.", "support i information theory.", "support aging information theory.", "support a information theory."

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain intermediation theory.") OR ("support agri information theory."))~.
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