Apex domains cannot have CNAME records.
Question and response
Question
dig aungmyowin.com. NS
Answer
aungmyowin.com. 4 NS ns-1124.awsdns-12.org.
aungmyowin.com. 4 NS ns-391.awsdns-48.com.
aungmyowin.com. 4 NS ns-456.awsdns-57.com.
aungmyowin.com. 4 NS ns-1363.awsdns-42.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0