Brang has never been accepted as a word in dictionaries but it is in common use in spoken English as the past simple form of Bring. The correct form according to dictionaries is Brought.
When you are learning English, you need to learn the past simple and past participle forms of verbs.
Conor is the main writer here at One Minute English and was an English teacher for 10 years. He is interested in helping people with their English skills and learning about using A.I tools at work.