Perhaps you should try some spelling variations:
roman conversations » design conversations
upon conversations » union conversations, open conversations, spoken conversations
reef history » brief history, reeves history, reef fishery
bief history » brief history, brief hystory, imf history
21 germany » 11 germany, 2 germany, 20 germany

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 conversations) OR (roman conversations)) %21 germany %((reef history) OR (bief history)) %2.2 ((20th century) OR (18th century))%22.
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) or (roman conversations)) %21 germany %((reef history) or (bief history)) %2.2 ((20th century) or (18th century))%22*.