Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
reef history » brief history, reeves history, reef fishery
bief history » brief history, brief hystory, imf history
2f germany » 2 germany, 20 germany, 21 germany
2023 20th » 2023 26th, 2023 10th, 2020 20th
2.2 20th » 2020 20th, 2021 20th, 2022 20th
2f 20th » 20 20th

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 conversations %2f germany %((reef history) OR (bief history)) %((2f 20th) OR (((2.2 20th) OR (2023 20th)))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %2f germany %((reef history) or (bief history)) %((2f 20th) or (((2.2 20th) OR (2023 20th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %2f germany %((reef history) or (bief history)) %((2f 20th) or (((2.2 20th) OR (2023 20th)))) century%22*.