code: function( term ) {
          var split_term = term.split(' ');
          var matchers = [];
          for (var i=0; i < split_term.length; i++) {
            if ( split_term[i].length > 0 ) {
              var matcher = {};
              matcher['partial'] = new RegExp( $.ui.autocomplete.escapeRegex( split_term[i] ), "i" );
              if ( context.settings['relevancy-sorting'] ) {
                matcher['strict'] = new RegExp( "^" + $.ui.autocomplete.escapeRegex( split_term[i] ), "i" );
              }
              matchers.push( matcher );
            }
          };
  
          return $.grep( context.options, function( option ) {
            var partial_matches = 0;
            if ( context.settings['relevancy-sorting'] ) {
              var strict_match = false;
              var split_option_matches = option.matches.split(' ');
            }
            for ( var i=0; i < matchers.length; i++ ) {
              if ( matchers[i]['partial'].test( option.matches ) ) {
                partial_matches++;
              }
              if ( context.settings['relevancy-sorting'] ) {
                for (var q=0; q < split_option_matches.length; q++) {
                  if ( matchers[i]['strict'].test( split_option_matches[q] ) ) {
                    strict_match = true;
                    break;
                  }
                };
              }
            };
            if ( context.settings['relevancy-sorting'] ) {
              var option_score = 0;
              option_score += partial_matches * context.settings['relevancy-sorting-partial-match-value'];
              if ( strict_match ) {
                option_score += context.settings['relevancy-sorting-strict-match-value'];
              }
              option_score = option_score * option['relevancy-score-booster'];
              option['relevancy-score'] = option_score;
            }
            return (!term || matchers.length === partial_matches );
          });
        }
docs: loose matching of search terms