AngularJS: ng-view is not replaced, when i open with a sub url in chrome's address bar

I found that the content of ng-view isn't replaced when i request a sub url of my app directly in Chrome's address bar. but if i request the url from a tag, then it works perfectly.

i also checked the log, but it shows nothing...

e.g. Here is a module of my app which defines the router '/search'

(function () {
    'use strict';
    angular
        .module('search',[])
        .config(['$routeProvider', function($routeProvider) {
            $routeProvider.when('/search', {
                templateUrl: 'search/search.html',
                controller: 'Search',
                controllerAs: 'vm'
            });
        }]);
})();

if i direct request /search in my browser's address bar, the ng-view is totally empty, but if i request /search from a tag, it works.