Suggest to proceed to repair at workshop, usually the keypoints of diagnose are:
1. Check and adjust tyre pressure
2. Check tyre wear level and replace it if necessary
3.Check the car steering rack, replace them if found malfunctioned
4. Check the car knuckle, repalce them if found malfunctioned
5. Repairing done, proceed with alignment adjustment to ensure the tyre is in optimum driving angle on the car