Perhaps you should try some spelling variations:
22christian union » christian union, christian upon
christian unity » christian union, christian laity, christian divinity
ref history » reef history, brief history, bief history
21 germany » 2.1 germany, 2 germany, 20 germany
11 germany » 11 german, 1918 germany, 7 germany
2023 18th » 2023 8th, 2023 11th, 2023 10th

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 (11 germany)) %ref history %2023 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) or (christian unity)) conversations %((21 germany) OR (11 germany)) %ref history %2023 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian unity)) conversations %((21 germany) OR (11 germany)) %ref history %2023 18th century%22*.