Perhaps you should try some spelling variations:
9.13 germany » 9.14 germany, 9.15 germany, 9.16 germany
2.1 germany » 21 germany, 2017 germany, 9.14 germany
imf history » brief history
2f history » etf history, ref history, tnf history
2020 18th » 2020 16th, 2020 15th, 2020 8th

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 (9.13 germany)) %((2f history) OR (imf history)) %2020 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((2.1 germany) OR (9.13 germany)) %((2f history) or (imf history)) %2020 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((2.1 germany) OR (9.13 germany)) %((2f history) or (imf history)) %2020 18th century%22*.