Perhaps you should try some spelling variations:
9.13 germany » 9.14 germany, 9.15 germany, 9.16 germany
20th century » 18th century
2.1 germany » 2017 germany, 9.14 germany, 9.15 germany
20 germany » 8 germany, 5 germany, 6 germany
21 germany » 11 germany, 8 germany, 5 germany
2f history » imf history, etf history, ref history
2 germany » 2 german, 8 germany, 5 germany
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 %((((((2 germany) OR (20 germany))) OR (7 germany))) OR (((21 germany) OR (((2.1 germany) OR (9.13 germany)))))) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((((2 germany) or (20 germany))) or (7 germany))) or (((21 germany) or (((2.1 germany) OR (9.13 germany)))))) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((((2 germany) or (20 germany))) or (7 germany))) or (((21 germany) or (((2.1 germany) OR (9.13 germany)))))) %2f history %2f 20th century%22*.