How to get two matches on multiple groups

Invoice total section contains text

Sum without 20% _48,15
Vat 20% _9,63
Invoice total (EUR)_57,78

Tried to get Vat text and VAT sum using nested group kmtekst

var tekst=@"Sum without 20% _48,15
Vat 20% _9,63
Invoice total (EUR)_57,78
";

var rida = Regex.Match(tekst, @"(?si).*(?<kmtekst>Vat(_)?(\s)?(20%)?(:))?(\s)?(_)?(?<kmaks>[\d,\.]*)(\s)?.*");

rida.Success is true but

but

rida.Groups["kmaks"].Value

and

rida.Groups["kmtekst"].Value

are empty. How get

9,63 as rida.Groups["kmaks"].Value

and

Vat 20% as rida.Groups["kmtekst"].Value ?

Using .NET 7 ASP.NET MVC controller Rexgep

Try the following.

var rida = Regex.Match(tekst, @"(?<kmtekst>Vat.+%).+?(?<kmaks>\d.+)");