Perhaps you should try some spelling variations:
22christian union » christian union, christian upon
christian unity » christian union, christian laity, christian divinity
bief history » brief history, brief hystory, imf history
20 germany » 2 germany, 7 germany, 8 germany
21 germany » 2.1 germany, 11 germany, 2 germany
2023 20th » 2023 26th, 2023 10th, 2020 20th
2f 20th » 20 20th, 2.2 20th

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 %((20 germany) OR (21 germany)) %bief history %((2f 20th) OR (2023 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) OR (christian unity)) conversations %((20 germany) or (21 germany)) %bief history %((2f 20th) or (2023 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) OR (christian unity)) conversations %((20 germany) or (21 germany)) %bief history %((2f 20th) or (2023 20th)) century%22*.