"Mirage of factors"

Today I came across the phrase "mirage of factors", used in the same way one would say "variety of factors". I thought this had to be a mistake, but a google search shows that this is indeed a niche phrase, returning ~23,000 results.

My dictionary doesn't have a definition for 'mirage' that fits this usage, so I have to guess this is a minor turn of phrase. Has anyone else come across this phrase, and does anyone know its history?

Solution 1:

In perhaps a very specific context, mirage of factors might refer to conflicting factors or factors created a mirage together. For example, "it was the mirage of factors that had caused Napoleon underestimate Russia's winter which ultimately led to his downfall."(It's a bit weird but native english speakers will know what you mean). It's definitely not a set phrase you will find in the dictionary. However, I agree with High Performance Mark that it is most likely a typo for myriad.