Briefly:
The correct term for the martial art in discussion is Qwan Ki Do or Quán Khà Đạo.
It's a martial art method founded in 1981 by Master Pham Xuan Tong in France. It's recognized officially as a vietnamese style by the Vietnamese Martial Arts Federation.
The style has chinese influences (mostly southern- NGA MI PHAI, NAM QUYEN THIEU LAM,NGA MI PHAI ) due to the fact that Master Pham Xuan Tong has been thought martial arts as a child by Master Chau Quan Ki ,a chinese emigrant of Hakka descent in Vietnam. Vietnamese influence includes Vo ItQUANG BINH, Vo BINH DINH and Vo BACH NINH.
Trade marks: low stances,double hands blocks, leg scissors techniques (from low levels to top (neck) ), kicks while hands are protecting the groins and face, throws,joint locks, double jumping kicks
It's very popular in Italy, France, Romania, different African countries.
The fight for competition SONG DAO - one gloved hand which you can hit to the face, and the bare hand to the body.
Traditional fight DAU TU DO - full body contact
And more but as I said I want to be briefly
It depends on the person if he likes a style or not, from my experience I can say I enjoy and after a decade or so I'm starting to understand the basics...so the path is long!Peace