Untitled

document.querySelectorAll("html frameset frameset frame"); //works
document.querySelectorAll("html frameset frameset frame html"); //returns empty node list.
document.querySelectorAll("html frameset frameset frame body5"); //returns empty node list.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
  <frameset >
   <frameset >
    <frame >
     <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
       <body class="body5">