Perhaps you should try some spelling variations:
christianity from » christianity great, christianity _, christianity a
bief history » brief hystory, imf history, reef history
ref history » reef history, imf history, etf history
21 germany » 2.1 germany, 2 germany, 20 germany
11 germany » 11 german, 1918 germany, 7 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) OR (christianity early)) conversations %((21 germany) OR (11 germany)) %((ref history) OR (((bief history) OR (brief history)))) %2.2 ((20th century) OR (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 (((bief history) or (brief history)))) %2.2 ((20th century) OR (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 (((bief history) or (brief history)))) %2.2 ((20th century) OR (18th century))%22*.