Perhaps you should try some spelling variations:
open conversations » agent conversations, roman conversations, content conversations
christian open » christian opened, christian open'd, christian popes
reef history » brief history, reeves history, imf history
reef fishery » reef fishes, reef fish
bief history » brief history, brief hystory, imf history
ref history » brief history, imf history, etf history
21 germany » 2.1 germany, 11 germany, 2 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 open conversations %21 germany %((((ref history) OR (((reef history) OR (reef fishery))))) OR (bief history)) %2.2 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian open conversations %21 germany %((((ref history) or (((reef history) OR (reef fishery))))) or (bief history)) %2.2 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian open conversations %21 germany %((((ref history) or (((reef history) OR (reef fishery))))) or (bief history)) %2.2 18th century%22*.