Thanks Nata
Re Visa: I could cancel his visa as it is only me who qualifies ...he is here om a spouse visa. If he is living with me he can stay but is not allowed to reside elsewhere - all addresses have to be lodged with the police - nor is he allowed to work. I am the only one with a work permit. I just had to say he was no longer my dependant - which is true - and the visa was cancelled.
I do have a lawyer in Turkey - where we married- and am waiting for her report/plan for settling the divorce and property. My worry is that he could pre-empt this if he finds out too soon that he has to leave Vietnam. I do not trust him at all. He is a very devious person - even for an alcoholic.