Perhaps you should try some spelling variations:
22christian union » christian upon
christian unity » christian laity, christian divinity, christian charity
20th century » 18th century
ref history » reef history, brief history, bief history
20 germany » 2 germany, 7 germany, 8 germany
21 germany » 2 germany, 7 germany, 8 germany
11 germany » 11 german, 1918 germany, 7 germany
2f 20th » 20 20th, 2.2 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: %((22christian union) OR (((christian unity) OR (christian union)))) conversations %((20 germany) OR (((21 germany) OR (11 germany)))) %ref history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) or (((christian unity) or (christian union)))) conversations %((20 germany) or (((21 germany) OR (11 germany)))) %ref history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (((christian unity) or (christian union)))) conversations %((20 germany) or (((21 germany) OR (11 germany)))) %ref history %2f 20th century%22*.