Do I need a hongkong visa if I want to stay for more than 14 days in hongkong? bus visa procedure?

Yes, you need a Hong Kong visa if you want to stay for more than 14 days in Hong Kong. There is another option for you, when you stay in Hong Kong for 14 days, you can go to Macau, then return to Hong Kong for another 14 days, if you do so, you don't need to apply for a Hong Kong.