Perhaps you should try some spelling variations:
christian upon » christians upon, christianity upon, christ upon
reef history » brief history, reeves history, reef fishery
2 germany » _ germany, 7 germany, 2 german
2021 20th » 2020 20th, 2021 10th, 2023 20th
2021 24th » 2021 4th, 2021 6th, 2021 7th

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: %((christian upon) OR (christian union)) conversations %2 germany %reef history %((2021 20th) OR (2021 24th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %((christian upon) or (christian union)) conversations %2 germany %reef history %((2021 20th) or (2021 24th)) century%22*.