Perhaps you should try some spelling variations:
great conventional » green conventional, direct conventional, spread conventional
brief hystory » brief herstory, brief story, bief history
20th century » 18th century
ref history » reef history, bief history, imf history
21 germany » 11 germany, 2 germany, 20 germany
2.2 20th » 2020 20th, 2023 20th, 2021 20th
%christianity » %christian

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 great conventional %21 germany %((ref history) OR (((brief hystory) OR (brief history)))) %2.2 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christianity great conventional %21 germany %((ref history) or (((brief hystory) or (brief history)))) %2.2 20th century%22*.