Perhaps you should try some spelling variations:
christianity from » christianity great, christianity _, christianity a
bief history » brief hystory, imf history, reef history
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, imf history, etf history
2.2 20th » 2020 20th, 2023 20th, 2021 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: %((christianity from) OR (christianity early)) conversations %2.1 germany %((ref history) OR (((bief history) OR (brief history)))) %2.2 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((christianity from) OR (christianity early)) conversations %2.1 germany %((ref history) or (((bief history) or (brief history)))) %2.2 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %((christianity from) OR (christianity early)) conversations %2.1 germany %((ref history) or (((bief history) or (brief history)))) %2.2 20th century%22*.