Perhaps you should try some spelling variations:
invent conversations » content conversations, violent conversations, agent conversations
design conversations » design construction, design conclusions, design consideration
union conversations » win conversations, driven conversations, second conversations
20th century » 18th century
etf history » reef history, imf history, tnf history
ref history » reef history, brief history, bief history
20 germany » 2 germany, 7 germany, 8 germany
2f germany » 2 germany, 21 germany, 25 germany
2f 20th » 20 20th, 2.2 20th

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 ((((union conversations) OR (invent conversations))) OR (((design conversations) OR (design considerations)))) %((2f germany) OR (20 germany)) %((etf history) OR (ref history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((((union conversations) OR (invent conversations))) or (((design conversations) or (design considerations)))) %((2f germany) or (20 germany)) %((etf history) or (ref history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((((union conversations) OR (invent conversations))) or (((design conversations) or (design considerations)))) %((2f germany) or (20 germany)) %((etf history) or (ref history)) %2f 20th century%22*.