Perhaps you should try some spelling variations:
22christian union » christian union, christian unity
christian upon » christians upon, christian union, christianity upon
reef history » reeves history, reef fishery, imf history
19th century » 18th century, 20th century
21 germany » 11 germany, 2 germany, 20 germany
2023 19th » 2023 9th, 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 %21 germany %((brief history) OR (reef history)) %2023 19th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) OR (christian upon)) conversations %21 germany %((brief history) or (reef history)) %2023 19th century%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) OR (christian upon)) conversations %21 germany %((brief history) or (reef history)) %2023 19th century%22*.