I agree, but that's just how search functions work. Go on the Wikipedia article for "Wi-Fi"... a page search for "wifi" yields 19 results, while adding the hyphen gets you 191 results. And that was also one specific example from the manual where it happened to have a "gotcha". If you search something like "volt" in the PDF, it will bring up results like "volt", "volts", and "voltage".That's rather obtuse.