Perhaps you should try some spelling variations:
22christian union » christian union, christian upon
christian unity » christian union, christian laity, christian divinity
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
21 germany » 11 germany, 2 germany, 20 germany
2f history » 2.1 history, imf history, etf history
2020 20th » 2020 16th, 2020 2021, 2020 4th
2020 5th » 2020 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: %((22christian union) OR (christian unity)) conversations %((21 germany) OR (2.1 germany)) %2f history %((2020 20th) OR (2020 5th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) or (christian unity)) conversations %((21 germany) or (2.1 germany)) %2f history %((2020 20th) OR (2020 5th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian unity)) conversations %((21 germany) or (2.1 germany)) %2f history %((2020 20th) OR (2020 5th)) century%22*.