Perhaps you should try some spelling variations:
christian upon » christians upon, christianity upon, christ upon
1918 germany » 8 germany
ref history » reef history, bief history, imf history
11 germany » 11 german, 7 germany, 8 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th

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 upon) OR (christian union)) conversations %((11 germany) OR (1918 germany)) %((ref history) OR (brief history)) %2.2 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((christian upon) or (christian union)) conversations %((11 germany) OR (1918 germany)) %((ref history) or (brief history)) %2.2 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %((christian upon) or (christian union)) conversations %((11 germany) OR (1918 germany)) %((ref history) or (brief history)) %2.2 18th century%22*.