In backend com_tags when searching for a tag name the list is filtered with only tags which include that string in the name. There's no way to display also child tags of those results.
This is uncomfortable when you have a very high number of tags and you want to view all childs of a specific tag: there's no way to do that, unless you move page by page to the page of that tag.

For example let's say we have
...

• alpha
• beta
  • child 1
  • child 2
• gamma
  ...

To display all childs of beta I need to move to the exact page of beta in the tag list, because if I search for "beta" I get only beta tag shown.

There should be a way to search for "beta" and then get a list of all childs.