Perhaps you should try some spelling variations:
christian unity » christian laity, christian divinity, christian charity
20th century » 18th century
21 germany » 11 germany, 2 germany, 20 germany
2f history » imf history, etf history, ref history
1 german » 3 german, 2 german, 5 german
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: %((christian unity) OR (christian union)) conversations %((21 germany) OR (((11 german) OR (1 german)))) %2f history %2.2 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((christian unity) or (christian union)) conversations %((21 germany) or (((11 german) OR (1 german)))) %2f history %2.2 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %((christian unity) or (christian union)) conversations %((21 germany) or (((11 german) OR (1 german)))) %2f history %2.2 20th century%22*.