I wasted a lot of time wondering why I could never find those packages.

Check the /etc/yum.conf file and at the bottom look for the "exclude=" line. 

Below is what I found in mine

exclude=apache* httpd* mod_* mysql* MySQL* da_* *ftp* exim* sendmail* php* bind-chroot*

Just remove those entries or uncomment that line and you'll get access to the missing applications.