How to select a regexp group in vim?

Question

I want to select/visualize a regexp GROUP in a vim regexp expression in vim.

By example I would like to highlight (search) a span of characters inside square brackets, having this line:

bla bla bla [Corso De Stefanis 88 interno 4](address) blabla

I would like to just select this sequence of chars:

Corso De Stefanis 88 interno 4

So I tried the regexp

/\[\(.\{-}\)\]

Where the aim is to have the regexp GROUP \(.\{-}\) contained in sqare brackets. But in this case I select the pattern including square brackets (see screeenshot).

And if I specify the referenced group with \1, the search fails:

/\[\(.\{-}\)\]\1

Where I'm wrong?

Answer 1

reading here: exclude character classes inside [] in a regex

and here: exclude character classes inside [] in a regex

I find the solution, that's:

/\[\zs.\{-}\ze\]

In a sense, capture group seems not working, but you can select the "group" preceding sequence by \zs and finishing with \ze. vim regexp syntax is weird for me.