Settings app options don't appear in search results on win10

Question

When using search (by pressing the win button and writing my query) I don't seems to get results from the settings (the one with the gray background):

For example, if I search for mouse I get the control panel Mouse settings:

But if I search for windows update or bluetooth I don't get any results:

Meanwhile, searching for cortana settings (which shows directly in the search window) seems to be fine:

I have rebuilt my index but it does not seem to have changed anything. It currently looks like this:

Anyone have any tips on how to fix it?

Answer 1

Updating to Threshold 2 (Windows 10 November update) seems to have fixed it.

Answer 2

(This would've been a comment but this is a new account, if I say something drastically wrong please do mention it)

The solution posted by Insane in this post, and Wouter's answer they linked in a comment didn't work for me, but what did work was opening Indexing Options -> Advanced -> Troubleshoot search and indexing, and selecting Files, folders, apps or settings don't appear in results.

I suspect my problem came from renaming my users\username folder recently, due to personal reasons, and while I expect that most users here will already know to check the troubleshooter, I didn't even know Indexing Options existed, so for other users like me I figured adding an answer couldn't hurt.
For most cases though, I expect other answers to work over mine (unless the troubleshooter is a new feature in which case try it first I guess?)

Answer 3

This seems to be a common problem for people with SSDs. For some people reubilding the index works, but seeing as it did not work for you, try this:

1. Go to This PC and right click on whichever drive Windows is installed on. We will assume C:\
2. Right click and choose properties
3. At the bottom of the "General" tab, make sure Allow files on this drive to have contents indexed in addition to file properties is checked.

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Also make sure under Modify, then C:\ -->Users that all the users are selected:

It's possible somehow your user got de-selected.

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Source: Windows 8.1 Search not finding Control Panel Settings

Note that answer 2 from the source will not work on Windows 10.