I showed this to my father (a professional orchestra musician), who explained to me that in some countries (notably France, Italy, Spain, etc), they actually use “do = C”, “re = D” etc. I didn’t know this, because, well, I learnt that there was a difference between the usage of the two things.
So it seems I’ll have to take back at least partially what I said above. You might therefore have more luck searching for your music in some Romance language! 
Also, don’t search for it in German, they call the B-flat / ti-flat a B and the B / ti an H…