Course Filter Hooks API

I would like to add more custom filter blocks on courses page other than existing “Category”, “Subcategory”, “Status”, “Level”, “Price”, “Instructor” allowed.

I found this support topic is related to what I want: https://ww.wp.xz.cn/support/topic/hooks-and-filter-for-categories/ . But when I clicked the link of Hooks API shared by James StylemixThemes @jamesstylemixthemes, the shared file has expired. Can James extend the file sharing? Or anyone please provide Hooks API and instruction of how to add more custom filter blocks on courses page? Thanks.

The page I need help with: [log in to see the link]