DataTable Enter Key to Search

Question

I have tried

search: {
  return: true
}

But it is not working in my DataTables version 1.10.15

I want to disable the auto search on each letter entering in the search field. Instead of that enter all the characters and hit enter button then only need to display the search results.

I am using an AJAX call to populate the search. So entering each letter executing a MySQL query in the backend.