Hello @ngochoang1985
Welcome to Steemit.
Great when you introduce to everyone. This increases trust in our community.
I hope you will re-introduce again with more information about you. Maybe it will help you find friends who have something in common.
The introduce article, you should to use tag #introduceyourself, and let the Vietnamese community know about you, you should use the #vn and #vn-newbie tags.
Again, welcome!