404. That’s an error.
The requested URL /add?source=atgs&feedurl=https://rongbay.com/rss/Hoa-Binh/c15_Mua-Ban-nha-dat.rss was not found on this server. That’s all we know.
/add?source=atgs&feedurl=https://rongbay.com/rss/Hoa-Binh/c15_Mua-Ban-nha-dat.rss