Perhaps you should try some spelling variations:
conscious conversations » conscious conversation, conscious operations, curious conversations
curious conversion » curious confession, curious conversations, cur's conversion
reef history » brief history, reeves history, reef fishery
20th century » 18th century
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2f 20th » 20 20th, 2.2 20th

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: %22christian ((conscious conversations) OR (curious conversion)) %21 germany %((reef history) OR (imf history)) %2f 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian ((conscious conversations) or (curious conversion)) %21 germany %((reef history) or (imf history)) %2f 20th century%22*.