Perhaps you should try some spelling variations:
22political science » political science, inpolitical science, political sciences
2f bibliography » 23 bibliography, 21 bibliography, 24 bibliography
22 bibliography » 2 bibliography, 12 bibliography, 2.7 bibliography
mef catalogs » e catalogs, icf catalogs, gems catalogs
2f catalogs » icf catalogs, 2.4 catalogs, _ catalogs

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22political science %((2f bibliography) OR (22 bibliography)) %((2f catalogs) OR (mef catalogs))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22political science %((2f bibliography) or (22 bibliography)) %((2f catalogs) OR (mef catalogs))%22".
• Adding a wildcard symbol may retrieve word variants: %22political science %((2f bibliography) or (22 bibliography)) %((2f catalogs) OR (mef catalogs))%22*.