I believe that I can change you by my love br br "KNOCKING ON DOORS" is a reality show with many emotions about family with the aim to bring precious values of family ties. With the two charming and funny hosts Quoc Thuan and Thuy Nga, they will knock on a family's door at meal time to greet and get to know the current situation of the family as well as their joy, worries, regrets and wishes...