How to send modified url when get mention form get submitted?

I have a search form, and I want to change the url from:
https://www.example.com/search?search=term+term
to:
https://www.example.com/search/term+term

I know how to use htaccess, but I don't know how to send user to friendly URL after he submit the form.

Here is my form:

<form action="search" method="get">
    <input type="text" name="search" id="Searchx" placeholder="Search Marketplace" />
</form>