Perhaps you should try some spelling variations:
spoken conversations » open conversations, oboen conversations, taken conversations
spoken conversation » open conversation, sponsor conversation, modern conversation
bief history » brief history, brief hystory, reef history
20th century » 18th century
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th

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 ((spoken conversations) OR (spoken conversation)) %21 germany %((imf history) OR (bief history)) %2020 20th century%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((spoken conversations) OR (spoken conversation)) %21 germany %((imf history) or (bief history)) %2020 20th century%22*".