404. That’s an error.
The requested URL /add?feedurl=http://maydonhietdotiepxuc-ebro.sieuthithietbido.com/may-do-nhiet-do-ebro-tfx-422.rss was not found on this server. That’s all we know.
/add?feedurl=http://maydonhietdotiepxuc-ebro.sieuthithietbido.com/may-do-nhiet-do-ebro-tfx-422.rss