Perhaps you should try some spelling variations:
22christian union » christian union, christian unity
christian upon » christians upon, christian union, christianity upon
2.1 history » 1.1 history, 601 history
21 germany » 2 germany, 20 germany, 7 germany
11 germany » 11 german, 1918 germany, 7 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th

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) OR (11 germany)) %2.1 history %2.2 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian upon)) conversations %((21 germany) or (11 germany)) %2.1 history %2.2 18th century%22*.