A judicious correction by Cindou on the word choir that I had written choir (the o followed by the e) suggested the following remarks.
The problem, anecdotal for this particular word, also arises for others, such as oeuvre, œillet or the word cœur, by far the most frequent in titles.
On the site today, there are 15 results with heart correctly spelled, and 14 pages of titles with heart written the o followed by the e.
It's understandable, many people don't know how to type it, and I myself was following the ox, thinking that the problem is the same when someone does a search.
So, first of all, how do you get the o in the e œ?
On Macs and, I'm told, in most modern versions of Word, you have to press Alt o (or Shift Alt o for Œ).
For those where that doesn't work, you can refer to the "e in the o" article on Wikipedia.
And those who know more would be welcome to share their experience.
Secondly, Cindou is right to respect the spelling, but it would be Dantesque to try to correct everything that already exists on the site.
So one advice for those who want to do an exhaustive search: for those who know how to type œ, do it with œ and with the o followed by the e. For the others, there is no other way than to learn how to type it.
Finally, I would be happy to have Slade's opinion on a possible computer solution, if it is not too cumbersome for a rather minor problem.
(P.S. The question also arises for æ (Æ). But besides the fact that it is rare (not many nævus or supernovae in songs), the problem seems infinitely more complicated in terms of coding).