Perhaps you should try some spelling variations:
win conversations » when conversations, ai conversations, ip conversations
1918 germany » 8 germany
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, brief history, bief history

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 win conversations %((1918 germany) OR (2.1 germany)) %ref history %2020 ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian win conversations %((1918 germany) or (2.1 germany)) %ref history %2020 ((20th century) OR (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %22christian win conversations %((1918 germany) or (2.1 germany)) %ref history %2020 ((20th century) OR (18th century))%22*.