Perhaps you should try some spelling variations:
22christian union » christian union, christian unity
christian upon » christians upon, christian union, christianity upon
ref history » reef history, brief history, bief history
20 germany » 7 germany, 8 germany, 5 germany
2 germany » 7 germany, 2 german, 8 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 upon)) conversations %((20 germany) OR (2 germany)) %ref history %2023 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian upon)) conversations %((20 germany) or (2 germany)) %ref history %2023 18th century%22*.