Problem with ADVANCED OPTIONS of Search Function

Hello,
I explain me better:

1. Ok. How can I change ONLY the template of this page, without change the template of other pages?
2. The question of clusters is: can I create groups of fields? Because, as shown in the image, it's a caotic page, and i want to make it orderly.
I would create group of fields, and in each group a would the fields in column, don't like the image!

Thank you.

Hello

sure you can

please create a joomla template override
(you can google this)

it is easy to do:
simply copy desired files into your Joomla template:

in your case, copy the file:

components/com_flexicontent/views/search/tmpl/default_form.php

to

templates/yourJoomlaTemplate/html/com_flexicontent/search/default_form.php

and edit it to customize it

Regards