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: %22agriculture AND state %((7 germany) OR (((1918 germany) OR (8 germany)))) %imf history %((2f 20th) OR (((20 20th) OR (90 20th)))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((7 germany) or (((1918 germany) OR (8 germany)))) %imf history %((2f 20th) or (((20 20th) or (90 20th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((7 germany) or (((1918 germany) OR (8 germany)))) %imf history %((2f 20th) or (((20 20th) or (90 20th)))) century%22*.