Perhaps you should try some spelling variations:
20th century » 18th century
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
2f history » 2.1 history, imf history, etf history
21 germany » 11 germany, 25 germany, 28 germany
27 germany » 7 germany, 17 germany, 25 germany
20 germany » 7 germany, 8 germany, 5 germany
26 germany » 6 germany, 25 germany, 28 germany
2 germany » 12 germany, 7 germany, 2 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 %((((((((26 germany) OR (27 germany))) OR (20 germany))) OR (2 germany))) OR (((21 germany) OR (2.1 germany)))) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((((((26 germany) or (27 germany))) or (20 germany))) or (2 germany))) or (((21 germany) OR (2.1 germany)))) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((((((26 germany) or (27 germany))) or (20 germany))) or (2 germany))) or (((21 germany) OR (2.1 germany)))) %2f history %2f 20th century%22*.