Volumes 1-25 and 37 were read by machine from the printed index books and are not all checked yet. A mistake? Fix it on that volume's index page and the fix shows here.
למה אין שמח"ת בש. שמחה דש. רק רנתינת התורה ולא גמרה של תורה. במ"ת דש. נכלל כה"ת14:157
Every topic in all the volumes' indexes together. Under each topic, each volume's pages, what is said there, and links to the sicha: its PDF open at the page, and its text. 3,492 topics · 37,219 references · 35 volumes. No source has been found yet for the indexes of volumes 26-29.