Excuse me!

I'm a newbie and having an issue. I want to type my language (Vietnamese) via telex method, so I installed "ibus-unikey" by these commands:
Code:
apt-get install ibus-unikey
Code:
im-config
Code:
ibus-setup
then I configured "ibus-unikey" and rebooted my system.
But after doing that route, I still couldn't type my language although there was an language changing icon on system tray?

Please help me!
Hope to receive your feedback soon!
Thank you, guys!