Ok,
just a note. If you use ReDJ to redirect any request from:

www.domain.com/Mivida-new-cairo

To:

www.domain.com/component/joomd/real-estate-egypt/search-results.html?field_33=mivida

And use the internal redirect, what happens is the browser still stay on the first URL, but for Joomla and ALL its extensions (included Tag Meta) the called URL is the second one. So the rule for Tag Meta should be created to matchthe second URL, not the source.

Hope this makes sense for you.

Kind regards,
Luigi