How to add a phone book to a Joomla 3 site with book content search on only one page (in JSN Builder Page tabs)?

Question

PHP

Hello friends, in general, I have such a task - I need to organize a telephone directory, or rather search by area code. Moreover, the cities need to be organized in tabs alphabetically, with which there are no problems - I installed the JSN Page Builder plugin, using it I broke the entire list of cities into tabs, but now there is a problem with searching by city. The fact is that a regular search does its job on the contents of the entire site, but I don’t know how to make it search for only one page.
I ask for your help, I will be very grateful for any tips, advice and sticking my nose into my ignorance.