Answer by Doorknob for Searching for text in smart quotes in dumb quotes doesn't work? “test: text”“xtest xtext”"dumb quotes"

I'm pretty sure that the cause of this is that smart quotes are treated as letters. For example, if you were using as instead of quotes, it would be something like

aError, something bad happeneda

And searching for

"Error, something bad happened"

Would not find it. A solution would just be to ignore smart quotes entirely, although that might not be the best idea.