Just click on any tags and youll find a search bar at the top
Try to Click here
http://www.mangago.me/tag/Marriage/
you can either use
http://www.mangago.me/tag// and imput the tag you want
OR
you can scroll down to any random manwha or manga and there should be a popular tag thing
click it and you should be able to search another one
BTW does anyone know how to search tags???