Perhaps you should try some spelling variations:
spoken conversations » spoken conversation, open conversations, oboen conversations
christianity spoken » christianity taken, christianity set, christianity stated
bief history » brief history, brief hystory, imf history
20th century » 18th century
etf history » reef history, imf history, ref history
2f germany » 2 germany, 20 germany, 21 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: %christianity spoken conversations %2f germany %((etf history) OR (bief history)) %2f 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christianity spoken conversations %2f germany %((etf history) or (bief history)) %2f 20th century%22*.