Perhaps you should try some spelling variations:
spoken conversations » spoken conversation, open conversations, oboen conversations
upon conversations » union conversations, open conversations, human conversations
20th century » 18th century
ref history » reef history, bief history, etf history
2 germany » 7 germany, 2 german, 8 germany
2.2 20th » 2020 20th, 2023 20th, 2021 20th

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 (spoken conversations)) %2 germany %((ref history) OR (((imf history) OR (brief history)))) %2.2 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((upon conversations) or (spoken conversations)) %2 germany %((ref history) or (((imf history) OR (brief history)))) %2.2 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) or (spoken conversations)) %2 germany %((ref history) or (((imf history) OR (brief history)))) %2.2 20th century%22*.