Well I thought a search for “retrun” would return lots of rarely called functions just waiting to be called and crash. But instead all of the misspellings appear to be in the comments only. Perhaps all languages have a way to catch this.
Can you think of other more treacherous typos that could slip into code? Or in general can any bugs be found using only Google code search?
BTW, somewhat related to searching for typos, I always get a laugh searching for people who think newbie is spelled “new bee”. My guess is that they overheard the term somewhere and somehow thought it was related to bees?