Possibly heater has filled with leaves from parking under trees, check drain in engine bay above steering rack. Have a friend pour in water under bonnet back-edge, and check inside car for signs of drips.
Check that door frame is a tight fit against windscreen pillar. Water may be running down from there.
Another possible cause is a failed windscreen seal (difficult to fix, go to a windscreen removal/refit shop as leaking of the glued-in windscreen suggests that it has become unglued - it must be completely removed/refitted to fix the leak.
Your English is better than any of my learned languages ever will be!
-Alex