Is there a way to know, if the similar post already exists ?

Hi, we are running a big media website, where we add a lot of resources to our blog from all over the world.

We need a way, so that when we add the title, the title field should show all the related posts to that title automatically, so we can know, if that post was already made by anyone in the past .

is that possible ?

We dont have to duplicate posts again and again.