Perhaps you should try some spelling variations:
22christian union » christian union, christian upon
christian unity » christian union, christian laity, christian divinity
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, brief history, bief history
20 germany » 8 germany, 5 germany, 6 germany
2 germany » 2 german, 8 germany, 5 germany

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)) conversations %((((20 germany) OR (((2 germany) OR (7 germany))))) OR (2.1 germany)) %ref history %2020 ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22christian union) or (christian unity)) conversations %((((20 germany) or (((2 germany) OR (7 germany))))) or (2.1 germany)) %ref history %2020 ((20th century) or (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %((22christian union) or (christian unity)) conversations %((((20 germany) or (((2 germany) OR (7 germany))))) or (2.1 germany)) %ref history %2020 ((20th century) or (18th century))%22*.