I’ve recently written an application to help everyone remember the history of Vietnam from Hồng Bàng period to Republicaním period and learn English as well. I’ve started building up the application from early June of 2015 to now. Due to little time spent on it, I collected data and pictures from internet, so they are not verified yet. I will update them once I get the feedbacks from you. Please contact me via my cell phone (+84) 936 127878 or email [email protected].