I tried to find John Owen's famous quotation, "be killing sin or it will be killing you" by entering that phrase, in quotes, in the "All" panel of the search window, but it returns no results despite my having John Owen's works. If I open The Mortification of Sin directly from Vol 6 of his works and search in that panel it finds the text.
Isn't the "All" search supposed to search all my books? Am I missing something here?