Perhaps you should try some spelling variations:
oboen conversations » open conversations, spoken conversations, bot conversations
christian oboen » christian about, christian boehm, christian onof
imf history » brief history
ref history » reef history, brief history, bief history
2f germany » 20 germany, 21 germany, 25 germany
2 germany » 7 germany, 2 german, 8 germany
2.2 20th » 2020 20th, 2023 20th, 2021 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 oboen conversations %((2f germany) OR (2 germany)) %((imf history) OR (ref history)) %((2f 20th) OR (2.2 20th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %christian oboen conversations %((2f germany) or (2 germany)) %((imf history) or (ref history)) %((2f 20th) or (2.2 20th)) century%22*.