Perhaps you should try some spelling variations:
20th century » 18th century
2f germany » 20 germany, 21 germany, 25 germany
11 germany » 11 german, 1918 germany, 8 germany
2f history » imf history, etf history, ref history
2 germany » 8 germany, 5 germany, 6 germany
2 german » 3 german, 5 german
2f 20th » 20 20th, 2.2 20th

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: %22agriculture AND state %((((2f germany) OR (((2 germany) OR (2 german))))) OR (((11 germany) OR (7 germany)))) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((2f germany) or (((2 germany) OR (2 german))))) or (((11 germany) or (7 germany)))) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((2f germany) or (((2 germany) OR (2 german))))) or (((11 germany) or (7 germany)))) %2f history %2f 20th century%22*.