How can i get url parameter in laravel?

You don't have to adjust the routes. But include $request in your controller method. Then use your request object to access it.

use Illuminate\Http\Request;

public function search(Request $request) {
    // to access the query parameters
    $search = $request->query->get('search');

    // similar but different syntax
   $search = $request->query('search');

    // generic method that checks all input including query
    $search = $request->input('search');
}