Perhaps you should try some spelling variations:
christianity from » christianity great, christianity _, christianity a
reef history » reeves history, reef fishery
bief history » brief hystory, brief herstory, brief historic
ref history » etf history, tnf history, reform history
21 germany » 2 germany, 20 germany, 7 germany
11 germany » 11 german, 1918 germany, 7 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th

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 %((21 germany) OR (11 germany)) %((((((ref history) OR (imf history))) OR (reef history))) OR (((bief history) OR (brief history)))) %2.2 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((christianity from) or (christianity early)) conversations %((21 germany) or (11 germany)) %((((((ref history) OR (imf history))) or (reef history))) or (((bief history) or (brief history)))) %2.2 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %((christianity from) or (christianity early)) conversations %((21 germany) or (11 germany)) %((((((ref history) OR (imf history))) or (reef history))) or (((bief history) or (brief history)))) %2.2 18th century%22*.