New Post: I can not get tag

private string LinkYouBeMegaStar()
        {
             var hw = new HtmlWeb();
            HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
            doc = hw.Load("http://www.megastar.vn/vn/saving-general-yang-digital-");         
            HtmlNode embed_tag = doc.DocumentNode.SelectSingleNode("//div[@class='c_trailer']");
                      
           HtmlNode embed = embed_tag.SelectSingleNode("embed[@id='template']");     
           
             return  embed.InnerText;
        }