If you know what to google then you probably know what to look for in the documentation. Its often just faster to google though. I think google is good for beginners that dont know what they dont know - or for a quick reference examples.

When i am learning a new language/library, rather than reading through the documentation trying to find something to solve my problem (as i dont know what to look for), i simply google it and get to the solution faster. I retain knowledge much better if its relevant to my current problem. Often i will then be able to place a name/concept to my problem and then be able to find it much easier in the documentation.