Dreams about snakes can often symbolize feelings of fear, anxiety, or transformation. In your dream, the snakes chasing you may represent something in your life that feels threatening or overwhelming. The fact that they are crawling fast suggests that this issue may be urgent or pressing.

The presence of your relatives from your mother's side could indicate that these feelings are connected to family dynamics or issues within that part of your family. Their actions of killing some snakes might symbolize attempts to confront or eliminate fears or challenges that you or your family are facing.

Overall, this dream may be urging you to reflect on what is causing you stress or fear in your waking life, especially related to family matters. It could be beneficial to address these feelings directly, whether through open communication with family members or by finding ways to cope with the pressures you're experiencing. Consider what the snakes might symbolize for you personally, and think about how you can confront the challenges they represent.