Welcome to SPERI! We kindly ask you to return to the Vietnamese page and please use Google Translate service that has already been installed on our web. Google Translate does not always produce 100% correct of translation; sometimes it is messy in the meaning. We very much apologize for any inconvenience due to our current lack of human resource! Kindly contact us at speri@speri.org if you wish to further your understanding and exchanges! With our very kind regards, SPERI team!