xchm Search in the Left Panel contents section

[aydo-prd]

Hello, In Debian based Pardus operating system In the chm extension ebook application downloaded from https://sbtransfer.saglik.gov.tr/index.php/s/E6q4pmkAHkF59eQ/download/ekitapV2.chm, Turkish language (ğ,ı,ü, etc.) cannot be searched in the left panel Contents section (For example, the word " broken "). . Is it possible to close all when the tabs are opened in the Contents section of the left panel? Can a Turkish version be added?

Thank you for your effort.