Ajax Search Lite keyword replacement

add_filter( 'asl_search_phrase_before_cleaning', 'asl_remove_words', 1, 1 );

function asl_remove_words( $phrase ) {
  /**
   * Comma separated list of exceptions
   * Change it to your needs
   */
  $exceptions = "word1, word2, word3";

  // ---- Dont change anything below this line ----

  $exceptions = str_replace(array(" ,", ", ", " , "), ",", $exceptions);

  return str_replace( explode(",", $exceptions), "asdasd", $phrase);
}