fuzzy search

jetpack-search-fuzzy.php

<?php
// Fuzzy search
add_filter( 'jetpack_search_es_query_args', 'es_fuzzy_search', 10, 2);

function es_fuzzy_search( $es_query_args, $query ) {
  $query = get_search_query();
  $es_query_args['query']['function_score']['query']['bool'] = array(
    'must' => array(
        array(
        'multi_match' => array(
          'fields' => array(
            "meta.search_content.value^3",
            "taxonomy.search_tag.name^2",
            "title"
          ),
          'fuzziness' => 'auto',
          'query' => $query,
          'operator' => 'and',
        ),
      ),
    ),
      'should' => array(
        array(
          'multi_match' => array(
            'fields' => array(
              "meta.search_content.value^3",
              "taxonomy.search_tag.name^2",
              "title"
            ),
            'fuzziness' => 'auto',
            'query' => $query,
            'operator' => 'and',
            'type' => 'phrase',
          ),
        ),
      ),
  );
  return $es_query_args;
}