Perhaps you should try some spelling variations:
9.13 germany » 9.14 germany, 9.15 germany, 113 germany
9.16 germany » 9.14 germany, 9.15 germany, 2.1 germany
imf history » brief history
2f history » 2.1 history, etf history, ref history
2020 20th » 2020 5th, 2020 6th, 2020 15th
2020 4th » 2020 5th

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 %((9.13 germany) OR (9.16 germany)) %((2f history) OR (imf history)) %((((((2020 20th) OR (2020 4th))) OR (2020 16th))) OR (2020 2021)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((9.13 germany) OR (9.16 germany)) %((2f history) or (imf history)) %((((((2020 20th) or (2020 4th))) or (2020 16th))) or (2020 2021)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((9.13 germany) OR (9.16 germany)) %((2f history) or (imf history)) %((((((2020 20th) or (2020 4th))) or (2020 16th))) or (2020 2021)) century%22*.