Perhaps you should try some spelling variations:
open conversations » agent conversations, roman conversations, content conversations
christians open » christians hope, christians men, christians over
10th century » 18th century, 20th century, 19th century
ref history » reef history, brief history, bief history
12 germany » 12 german, 2 germany, 14 germany
11 germany » 11 german, 1918 germany, 7 germany
2023 10th » 2022 10th, 2023 11th, 2013 10th

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "%christians open conversations %((12 germany) OR (11 germany)) %ref history %2023 10th century%22".
• Adding a wildcard symbol may retrieve word variants: %christians open conversations %((12 germany) OR (11 germany)) %ref history %2023 10th century%22*.