Perhaps you should try some spelling variations:
unity conversations » union conversations, unit conversions, city conversation
party conversations » late conversations
reef history » reeves history, imf history
reef fishery » reef fishes, reef fish
21 germany » 11 germany, 2 germany, 20 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 ((unity conversations) OR (party conversations)) %21 germany %((((reef history) OR (reef fishery))) OR (brief history)) %2.2 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((unity conversations) or (party conversations)) %21 germany %((((reef history) OR (reef fishery))) or (brief history)) %2.2 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((unity conversations) or (party conversations)) %21 germany %((((reef history) OR (reef fishery))) or (brief history)) %2.2 18th century%22*.