Thought I'd add for people that may not know, the quotes mean exact match for what's between the quotes and only give results if it includes that term (unless I mixed something up). Whenever you click on Google's 'must include' it puts quotes around the term. Can be handy or make things worse depending what you're looking for. Worse is while programming and tracking a specific issue, unless they used the exact words you won't get a result. Better for part numbers if they never get changed.

Been awhile since I went into the nitty gritty of the searching functions so if this is incorrect please reply with the correct info, been awhile since I really had to think about what quotes does behind the scenes.