Are you searching for Can Tho Province’s Immigration Office (Immigration Department in Can Tho)? Here's below address where you can contact in person to extend or renew your visa :
Address : 74 Lý Tự Trọng Street, An Cư Ward, Ninh Kiều district, Cần Thơ city, Cần Thơ Province.
Any request or support, please email to info@visa-vietnam.org