Like the help in the ? suggests use the item/spell id instead of the name. Easiest way to get that is link the item in chat then copy it out with ctrl+c and paste it in i.e. a text editor, the id is the first number including an eventual -sign ... the secnd number after the space can be ignored.
Carpe noctem! ... Get a life? Well, once I nearly found one, but the link was broken
Disclaimer: If you find spelling mistakes, be proud, grab a cookie and then spent a thought about me having german as my mothertongue