Perhaps you should try some spelling variations:
imf history » brief history
2f history » etf history, ref history, tnf history
2021 20th » 2021 24th, 2021 10th, 2023 20th
2020 20th » 2020 16th, 2020 2021, 2020 5th
2 german » 3 german, 5 german
2021 6th » 2021 7th

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 german %((2f history) OR (imf history)) %((((2021 20th) OR (2020 20th))) OR (2021 6th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %2 german %((2f history) or (imf history)) %((((2021 20th) OR (2020 20th))) or (2021 6th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %2 german %((2f history) or (imf history)) %((((2021 20th) OR (2020 20th))) or (2021 6th)) century%22*.