How to make your custom domain of blogspot blog access with domain or naked domain:Step 1: please follow the instruction on the Google Blogger help page:
Optional: You can also enter A-records, which links your naked domain (example.com) to an actual site (www.example.com). If you skip this step, visitors who leave off the "www" will see an error page.
Optional continued: After completing Step 8, enter your domain name in the format example.com, and list the I.P. addresses shown below in the "A" section. You'll need to create four separate A-records which point to four different Google IPs. 184.108.40.206
End of optional section
But only completing step 1, that is not enough:
Step2: Enable redirect naked domain to domain.
Go to blogger settings: enabled the "Redirect yourdomain.com to www.yourdomain.com."
see screenshots:In Godaddy DNS Manager panel:
In Blogger Manager panel:
Actually I did that by step2 then step 1. Anyway, it works.