Some tutorials are at Vista Forums instead of Seven Forums, and are only referenced in the Tutorial Index here. This is why some of them will not be in the search results, but are listed in the Index.
You would just need to know the main topic/subject you are looking for in the Index, and go to that letter to find it.
For example, you could just click on "P" at the top and find "Page File" or "Paging File" listed in alphabetical order though.
Hope this helps,