Perhaps you should try some spelling variations:
22christian union » christian unity, christian upon
20th century » 18th century
ref history » reef history, brief history, bief history
21 germany » 2.1 germany, 11 germany, 2 germany
11 german » 1 german
2.2 20th » 2020 20th, 2023 20th, 2021 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 union)) conversations %((21 germany) OR (11 german)) %ref history %2.2 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian union)) conversations %((21 germany) or (11 german)) %ref history %2.2 20th century%22*.