This is gonna get frustrating for you, but ... can't give specific detail answers and or fixes.
"the people tell me that moodle are inside of other moodle."
You already know it's a bad idea to have a moodle in a moodle. Agreed. But ...
Have you actually looked at the file system level? You have to cause we can't! A moodle has a config.php file at it's root. Is there a config.php file in those directories I asked you to look at? A moodle also has a version.php file at the same location/folder as the config.php file. That file, tells you the version of Moodle.
Howard is correct in that someone before you did something in-correctly and probably left no server documentation for you to use and figure out what's what and where. And we certainly cannot tell you.
Accessing the moodle site in the /neruo/ directory is done with a different URL? That's not really something you need to share here ... read further down ...
I have to ask this ... not meaning to confuse you ... but since I can't seem to reach https://site/neuro/ where you say the problem resides, in the configuration of the web server's main config file ... which should be in /etc/httpd/conf/httpd.conf
They look like:
# VirtualHost example:
# Almost any Apache directive may go into a VirtualHost container.
# The first VirtualHost section is used for requests without a known
# server name.
# ServerAdmin firstname.lastname@example.org
# DocumentRoot /www/docs/dummy-host.example.com
# ServerName dummy-host.example.com
# ErrorLog logs/dummy-host.example.com-error_log
# CustomLog logs/dummy-host.example.com-access_log common
Is there anything for /neruo/ there?
'spirit of sharing', Ken