Perhaps you should try some spelling variations:
open conversations » agent conversations, roman conversations, content conversations
22christian open » christian opened, christian hope, christian open'd
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, brief history, bief history
11 germany » 11 german, 1918 germany, 7 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th

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 open conversations %((11 germany) OR (2.1 germany)) %ref history %2020 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian open conversations %((11 germany) or (2.1 germany)) %ref history %2020 20th century%22*.