Thank you very much for your answer.
It is not what I need, but thanks for that clarification, it works the same way.
What I need is that the search engine does not show me suggested files when I start to write in it, that it ONLY show me the file when I write the word completely, in this way, I prevent users from seeing that there are other files similar to the one They are looking for.
For example, if I have two files whose name begins with car, but the name at the end is car-red-02.pdf and the other is car-green-02.pdf I am not interested in that when I write the word car, automatically show me the two files, ONLY when I write the one I am looking for.
This is because the files I am looking for are private and can only be seen by those who have the exact word with which they are going to look for them to verify that they exist within their official registry.