Perhaps you should try some spelling variations:
upon conversations » union conversations, spoken conversations, human conversations
open conversations » agent conversations, roman conversations, content conversations
bief history » brief history, brief hystory, imf history
reef history » brief history, reeves history, reef fishery
20th century » 18th century
ref history » brief history, imf history, etf history
21 germany » 2.1 germany, 11 germany, 2 germany
2023 20th » 2023 26th, 2023 10th, 2020 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 ((upon conversations) OR (open conversations)) %21 germany %((((ref history) OR (bief history))) OR (reef history)) %2023 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((upon conversations) OR (open conversations)) %21 germany %((((ref history) or (bief history))) or (reef history)) %2023 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) OR (open conversations)) %21 germany %((((ref history) or (bief history))) or (reef history)) %2023 20th century%22*.