mydomain.com/?s=Walsall&post_type=clubs

mydomain.com/clubs/?s=Walsall&post_type=club_societies

<div class="et_pb_search et_pb_module et_pb_bg_layout_light et_pb_text_align_left  et_pb_search_0 clear">
    <form role="search" action="<?php echo site_url('/'); ?>" method="get" class="et_pb_searchform">
        <input type="search" class="et_pb_s" placeholder="<?php echo esc_attr_x( 'Search Clubs and Societies...', 'placeholder' ) ?>" value="<?php echo get_query_var('club_societies'); ?>" name="s" title="<?php echo esc_attr_x( 'Search for:', 'label' ) ?>" />
        <input type="hidden" name="post_type" value="club_societies" /> <!-- // hidden 'players' value -->
        <input type="submit" class="et_pb_searchsubmit" alt="Search" value="Search" />
     </form>
 </div>