404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=http://khoisukinhdoanh.net/showthread.php?21584-Quang-cao-tren-da&title=&annotation= was not found on this server. That’s all we know.
/bookmarks/mark?op=add&bkmk=http://khoisukinhdoanh.net/showthread.php?21584-Quang-cao-tren-da&title=&annotation=