Perhaps you should try some spelling variations:
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
etf history » reef history, imf history, ref history
21 germany » 11 germany, 2 germany, 20 germany
2021 20th » 2021 24th, 2020 20th, 2023 20th
2021 10th » 2022 10th, 2021 13th, 2021 16th

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 %((2.1 germany) OR (21 germany)) %etf history %((2021 20th) OR (2021 10th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((2.1 germany) OR (21 germany)) %etf history %((2021 20th) or (2021 10th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((2.1 germany) OR (21 germany)) %etf history %((2021 20th) or (2021 10th)) century%22*.