Perhaps you should try some spelling variations:
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
2f history » imf history, etf history, ref history
21 germany » 11 germany, 2 germany, 20 germany
90 20th » 94 20th, 1990 20th
94 24th » 94 4th, 24 24th, 94 20th
94 14th » 14 14th, 94 11th, 94 19th
20 20th » 2019 20th, 2020 20th, 2023 20th

Try widening your search to All Fields.

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 %((((21 germany) OR (2.1 germany))) OR (7 germany)) %2f history %((20 20th) OR (((90 20th) OR (((94 24th) OR (94 14th)))))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((21 germany) OR (2.1 germany))) or (7 germany)) %2f history %((20 20th) or (((90 20th) or (((94 24th) or (94 14th)))))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((21 germany) OR (2.1 germany))) or (7 germany)) %2f history %((20 20th) or (((90 20th) or (((94 24th) or (94 14th)))))) century%22*.