Perhaps you should try some spelling variations:
20th century » 18th century
imf history » brief history
2f germany » 21 germany, 25 germany, 26 germany
20 germany » 8 germany, 6 germany, 4 germany
2f history » etf history, ref history, tnf history
2 germany » 2 german, 8 germany, 6 germany
5 germany » 5 german, 8 germany, 6 germany
_ germany » _ german
2f 20th » 20 20th, 2.2 20th

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 (20 germany))) OR (2 germany))) OR (((5 germany) OR (((7 germany) OR (_ germany)))))) %((2f history) OR (imf history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((((2f germany) OR (20 germany))) or (2 germany))) or (((5 germany) or (((7 germany) or (_ germany)))))) %((2f history) or (imf history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((((2f germany) OR (20 germany))) or (2 germany))) or (((5 germany) or (((7 germany) or (_ germany)))))) %((2f history) or (imf history)) %2f 20th century%22*.