Some level of disagreement and friction is normal. Avoid stressing over the small stuff:  Pick your battles. Avoid arguing over things like who sits where at the dinner table. See the bigger picture. Adjust your perspective. Your sibling may be irritable for reasons other than you, so avoid taking it personally. Family conflict is a universally common occurrence. There are several reasons why family social structures create the conditions for a variety of minor, and not so minor, forms of hostility. Learn these reasons to better understand your place in the structure and give in less to predictable, repeating patterns of interaction:  People notice and remember small differences in personality more than they do similarities. These small, recollected differences can create tension when you've lived with the person for many years. Cumulative annoyances are the basis for a lot of interpersonal conflict. Small grievances can explode into full-blown hostility over years of close proximity. Family systems are the perfect environment for these "social allergens" to grow. Siblings and parents/children are both prone to the same kind of conflict over things like competition for limited resources and personal eccentricities. Forgiveness is a powerful activity, contributing positively to overall happiness, health (including stress), and the harmony of relationships. Use these steps to forgive and let go of old conflict patterns:  See the positives. Has arguing with your sibling made you a more assertive person? It may seem counterintuitive, but seeing the good in the bad helps you move toward forgiveness. Generate empathy. Try to imagine what would cause the person to behave rudely to you. Maybe they feel jealousy about a perceived instance of favoritism by other family members. Understand that people lash out for a reason. Think of forgiveness as self-care. As mentioned, forgiveness grants a lot of positive benefits to the forgiver, emotionally and in terms of overall health. Forgive is positive for everyone involved....

TL;DR in Vietnamese:
Chấp nhận rằng xung đột là không thể tránh khỏi. Hiểu lý do vì sao các thành viên gia đình lại cãi nhau. Từ bỏ sự thù hận. Thực hành giải quyết mâu thuẫn. Có can đảm nói “không”.