Perhaps you should try some spelling variations:
21 germany » 11 germany, 20 germany, 7 germany
2 germany » 7 germany, 2 german, 8 germany
6 germany » 7 germany, 8 germany
5 germany » 7 germany, 5 german, 8 germany

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 (((21 germany) OR (((6 germany) OR (5 germany)))))) %brief history %2f 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((2 germany) or (((21 germany) or (((6 germany) or (5 germany)))))) %brief history %2f 18th century%22*.