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
20th century » 18th century
ref history » reef history, etf history, tnf history
21 germany » 11 germany, 2 germany, 20 germany
2021 20th » 2021 24th, 2020 20th, 2021 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: %christian open conversations %21 germany %((ref history) OR (((((bief history) OR (imf history))) OR (brief history)))) %2021 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian open conversations %21 germany %((ref history) or (((((bief history) or (imf history))) or (brief history)))) %2021 20th century%22*.