Perhaps you should try some spelling variations:
2.1 history » 1.1 history, 601 history
26 germany » 6 germany, 20 germany, 25 germany
21 germany » 11 germany, 20 germany, 7 germany
2f history » imf history, etf history, ref history
2 germany » 7 germany, 2 german, 8 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th
2f 20th » 20 20th, 2.2 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 %((((26 germany) OR (2 germany))) OR (21 germany)) %((2f history) OR (2.1 history)) %((2f 20th) OR (2020 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((26 germany) or (2 germany))) or (21 germany)) %((2f history) OR (2.1 history)) %((2f 20th) or (2020 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((26 germany) or (2 germany))) or (21 germany)) %((2f history) OR (2.1 history)) %((2f 20th) or (2020 20th)) century%22*.