Where the google analytics code must be placed so we can receive all the page views correctly? The code must be placed somewhere that if the ajax its enabled on the site https://careerjob.mb-themes.com/search to receive all the pageviews (even the ajax search from selecting a filter from the sidebar).

@developGr
I am not sure if ajax can actually get javascript code in response.
If yes, you would add code into search.php somewhere above or bellow listing loop.