lúc đến chỗ quản lí tổng thể nó ra cái này là seo : In this page, you can modify templates and change your forum look.
Modified templates are written in green.
(unpublished templates are shown red) To use the default template again, delete your template by clicking on delete.
Only templates of phpbb2 or PunBB versions will be affected.
giúp em :((