Perhaps you should try some spelling variations:
when conversations » open conversations, win conversations, agent conversations
22christian when » christians when, christian women, christian who
bief history » brief history, brief hystory, imf history
2021 century » 20th century, 21 century, 22 century
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
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: %22christian when conversations %((21 germany) OR (2.1 germany)) %bief history %2020 2021 century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian when conversations %((21 germany) or (2.1 germany)) %bief history %2020 2021 century%22*.