Hello all, i really high appreciate if someone can tell me about my case: im vietnamese and I had 45 day tourist free visa and after that i flu out. This time is 3rd time and at immigration check at airport, the lady told me I will have big trouble if i come back next time. I just think i can come in and out by flight many times as i want but the immigration lady warns me and im worried.

If anyone has the same situation as i did ?