Perhaps you should try some spelling variations:
22political science » political science, inpolitical science, political sciences
2f bibliography » 22 bibliography, 23 bibliography, 21 bibliography
2f catalogs » icf catalogs, 2.4 catalogs, mef catalogs

Try widening your search to All Fields.

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• Adding a wildcard symbol may retrieve word variants: %22Political Science %2F Bibliography %2F Catalogs%22*.