Perhaps you should try some spelling variations:
spoken conversations » spoken conversation, open conversations, oboen conversations
christian spoken » christian scorn, christian shore, christian steven
reef history » reeves history, reef fishery, imf history
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th

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 spoken conversations %2.1 germany %((reef history) OR (brief history)) %2020 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian spoken conversations %2.1 germany %((reef history) or (brief history)) %2020 20th century%22*.