The list is complete. The search is narrow. It matches the letters you type against discipline names only, as a plain run of characters, so a word that means the same thing finds nothing at all: "housing" will not surface Residential, and "buildings" will not surface Architecture.
Nothing is being fetched while you type, either. The whole list loads once when the step opens, and the box only hides the rows that do not match. That is why it responds instantly, and why it cannot find anything the list does not already literally contain.
When you get the empty state
No disciplines found matching "…", with a Clear search link under it, means no discipline's name contains what you typed. It does not mean the list failed to load, and reloading the page will not change it.
Do this instead:
- Select Clear search and read the list. It is short and alphabetical, and reading it end to end is usually faster than guessing at names.
- If you would rather search, type a fragment rather than a whole word. Three or four letters from the middle of a likely name will match more than a full word will.
- Check the spelling. Capitals do not matter. Everything else does, including hyphens and spaces.
The box waits before it filters
The list is filtered 300 milliseconds after you stop typing, not on each keystroke. On a slower machine that reads as a short pause in which nothing happens, so give it a moment before deciding the search found nothing.
The list is fixed
You cannot add a discipline of your own. The set is maintained by UNI and is identical for every project and every member, which is what makes discipline a useful thing to browse and compare work by across the platform.
If your work genuinely has no home in the list, choose the nearest one rather than leaving the step empty. A project with no discipline is harder for anyone to find. There is also a limit on how many you can attach to a single project: see How many disciplines a project can have.