Something like this is not supported and additional coding is required.
If you are not familiar with coding, please follow this guide: http://iwinter.com.hr/support/?page_id=1870
Customization hints for your developer:
Script version >= 1.5.9:
In your cms_config.php add:
$config['search_listing_page'] = 2;
where number 2 represents page ID where you wish to show results. Of course this page should have template which showing results or it not be visible.
For older script versions:
You should develop redirect to another page, with search json for api, details: http://real-estate.iwinter.com.hr/documentation/#!/public_api_rss