I've placed my customised template in : advanced_search.post.tpl file in \cscart\design\backend\templates\addons\codes_searching\hooks\common\advanced_search.
: {include file="buttons/button.tpl" but_text=__("search_products") but_onclick=$but_onclick but_href=$but_href but_role="submit-button" but_name=$but_name}
It doesn't work, please help me!
If there is no placed hook on default advanced_search.tpl file, it doesn't work to creating advanced_search.post.tpl hook file.
Your have only one way that override template.Because there is no hook to hooking.
You must create
backend\templates\addons\codes_searching\overrides\common\advanced_search.tpl
file.
Then copy default advanced_search.tpl file content to overriding content, and do your changes.