How about making a sign that says: (- change the unit # as needed.)
Xin vui lòng không công viên ở đây. Chỗ này là dành cho 4 đơn vị duy nhất. Cảm ơn bạn.
(Please do not park here. This spot is for unit 4 only. Thank you.)
I think this would perhaps call his bluff. If this doesn't work I liked the fold down bollard suggestion.
Good luck
Yes thanks Carmel
At first there were two Vietnamese brothers one excellent and a gentleman. Unfortunately the gentleman moved out apparently did not get along well with his brother. Unfortunately we are stuck with this guy that smokes, drinks and likes Asian girls too much well those things are observations but I do not like him pinching my car spot.
I hope what you have written above will get a laugh and hopefully understands. I do not want to make anyone an enemy.