Search limited to folder or a group of folders

First, search the help docs and this forum. Maybe your question has been answered! The debugging steps can help, too. Still stuck? Delete this line and proceed.

What I’m trying to do

I want to limit the search to a specific folder or to a grupu of folderes e.e. folder and its subfolderes
Thank you

Things I have tried

You’ll get better help if you follow the template.

Open that folder as a vault and then search in the new vault.

Effectively creates a nested vault.
But do everything apart from search in the big vault unless you have wrapped your mind around the implications of working in a nested vault system.

use path:MyFolder or path:Folder/MySubFolder in the query string

Use path, then in round brackets the search term. E.g.:
path:Canines (dog)

If you have a whitespace in the folder (which you can pick from the suggester), double quotes are used. Same for more than one search terms. E.g.:
path:"80 Animals" ("cats and dogs")