all my kids were born in kalookan city, can we secure nso birth certificates here in davao city?

secure nso marriage certificate in davao city even if our marriage was conducted in quezon city?

https://www.ecensus.com.ph/Secure/frmIndex.asp
This is a link that can be found on this website:
www.census.gov.ph

It says you can get your birth certificate anywhere, anytime.