More good for what? Please repost: Why do you think your dick is bad? Or good but not more good? Why do you want a more good dick? What do you want to achieve with a more good one? Do you want more children? How many do you have already? You must make your question more specific because there is not just one answer for every Tom, Dick & Harry.
What is more good? What is more good and what is the problem How old are you.The Penis grows to adult size during adolescelent and that's it. The length and diameter is all achived by then and you have to live with it. So do not worry and what ever you have be happy with it But if there is any deformity or concern get it checked by your doctor or a urologist.