Currently blogger doesn’t provide this feature, but you need not worry!
Here is a step by step guide to add multiple posts under different pages in blogger. So keep following!
Old Method
Steps
1. Goto main window of your blog. There in the left side you can find “Layout”. Click the Layout Menu.
2. Now you can see the layout of your blog. There you can find “Pages” gadget.
3. Click on “Edit” on pages tab . Now “Configuration Page List” window will open. There you can find hyperlink “Add link Page”. Click on it. Now give your page name and page url.
4. Give your page a label name. You can give the page url as external page or you can point out to Label Url.
“http://YOUR_BLOG.blogspot.in/search/label/YOUR_LABEL_NAME”
5. That’s it. Now just repeat the same steps for creating different pages. When you write a new post you just need to enter the same label name in which you want that post to be.
Note:- This Method may not work in your case, because the majority of times, Bloggers use 3rd Party Templates which will not have the pages Widget installed. So, you will not find a way to add Posts under pages or in the Menu section. But the below given “New Method” will surely work in all templates.