Perhaps you should try some spelling variations:
25 germany » 5 germany, 2 germany, 20 germany
2f history » imf history, etf history, ref history
2019 20th » 2019 4th, 2019 6th, 2019 5th
94 20th » 4 20th, 94 24th, 1994 20th
90 20th » 20 20th, 1990 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 %((25 germany) OR (7 germany)) %2f history %((2019 20th) OR (((94 20th) OR (90 20th)))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((25 germany) or (7 germany)) %2f history %((2019 20th) or (((94 20th) OR (90 20th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((25 germany) or (7 germany)) %2f history %((2019 20th) or (((94 20th) OR (90 20th)))) century%22*.