Perhaps you should try some spelling variations:
from conversations » from conversation, from conversational, roman conversations
christianity from » christianity early, christianity great, christianity _
reef history » reeves history, reef fishery
2.1 germany » 21 germany, 2017 germany, 9.13 germany

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: %christianity from conversations %2.1 germany %((imf history) OR (((reef history) OR (brief history)))) %2.2 ((20th century) OR (18th century))%22.
• Adding a wildcard symbol may retrieve word variants: %christianity from conversations %2.1 germany %((imf history) or (((reef history) or (brief history)))) %2.2 ((20th century) or (18th century))%22*.