Delve makes it easy to find documents and other items stored in Office 365. Sometimes some surprising results show up after a search. Maybe Microsoft needs to adjust some filters! https://www.petri.com/odd-delve-results
I see odd things pretty regularly in Delve. That said, I'd rather see odd things than no things. Delve *very* quickly became the centre of my workflow as far as search and document finding went - I don't even usually bother searching in OWA now.