If you have a fixed bridge, there's usually some type of adjustment "parts". They vary from model to model. On my Gibson there are two nuts I can turn to raise of lower the bridge.
If you have a bend neck, that could also be a reason for the buzzing. You could work with the trust rod to adjust it but .... that's tricky.
Naturally the best way to solve that is go to the music shop and get someone to work on it but not everybody has the money to do it. But if you do go to the shop ask the guy to tell you how he did it :)