Perhaps you should try some spelling variations:
open conversations » agent conversations, roman conversations, content conversations
christian open » christian opened, christian open'd, christian popes
bief history » brief hystory, reef history, brief herstory
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
ref history » reef history, etf history, tnf history
21 germany » 11 germany, 2 germany, 20 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th
2.2 20th » 2023 20th, 2021 20th, 2022 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: %christian open conversations %((21 germany) OR (2.1 germany)) %((ref history) OR (((((bief history) OR (imf history))) OR (brief history)))) %((2.2 20th) OR (2020 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian open conversations %((21 germany) OR (2.1 germany)) %((ref history) or (((((bief history) or (imf history))) or (brief history)))) %((2.2 20th) or (2020 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %christian open conversations %((21 germany) OR (2.1 germany)) %((ref history) or (((((bief history) or (imf history))) or (brief history)))) %((2.2 20th) or (2020 20th)) century%22*.