My problem got solved, you can use the non indexed links in new posts, so the Google bot can crawl that page too. It's better to add like read this article or read this sports too.
Suggest those links in this way you can get good ranking for your website.
Thats why google say that sitemap is important because this types of issues are due to interlinking of website ..... For example if your home page are linking to five page then first these five pages will index and after few days or month search engines will index other. If sitemap at site then chance to index all other pages at single time when bots will be at your site.