The Todo Testyle is searching for a text in the name of nodes in the specified context. It cannot be searched for ”;” since this is used to split into multiple search text.
If you want to search for multiple texts at the same time you can divide them by using a semicolon ”;”. If this is done e.g. ”#TODO;%TODO” for both of the texts is searched. That means one of them must exist in the name and a problem will be generated for it so you see it in the problems view.