Seems like you have fewer number of posts. Try using a Blogger Export File and convert it into WordPress WXR using https://blogger2wordpress.appspot.com This will handle export files upto 1MB in size. Now import this converted file into the WordPress Importer.
The blogger importer of WordPress mostly fails when there are more number of comments and posts.
Note: You can use Google Blog Convertors on your local machine to convert files greater than 1 MB
