Absolutely!I don't want to practice with students because they lack life experience, social information etc... Therefore, when talking with them you'll find it hard to talk about the same topic. We cannot talk about things happen in their school nor do they talk about working environment, for example.
After read your comments, IMHO, you can communicate with English speaking foreigner without any problems. So, if you want to improve your skill, a topic here is not good enough! Good English class might help!
In contrast, if you just need some where to practice, career networking through Linkedin and foreigner forum would be great to look for a real partner not Vietnamese!
In a Vietnamese community, we tend to communicate in mother tongue than the second language!