This is the basic SEO thing for Blogger/Blogspot blogs, if you want to have a better title display in the SERPs, you need to swap your post title with your blog name, or completely erase your blog name while viewing your blog post. Below are the instructions of both. It's your choice whether to retain your blog name or not, while viewing a single post.
To Swap your blog name and post title in Blogger follow Jackbook's Tip by clicking here.
To erase your blog name while viewing your blog post (if you want that your post title only will appear while you're in your blog post page) you need to follow Scrapur's tip by clicking here.
I hope this helps...
