WordPress search with more input fields?

I have this example of working search: <form action=”<?php echo esc_url(site_url(‘/’)) ; ?>” method=”get”> <input type=”search” name”s”> <input type=”submit” value=”search”> </form> and this works great, but what I want to archive is to make this search work with two more select boxes: <form action=”<?php echo esc_url(site_url(‘/’)) ; ?>” method=”get”> <select name=””> <option>Option one</option> <option>Option one</option>…