behave yourselfUsed to tell someone to behave well or treat others properly. The repeated ดีๆ adds emphasis and makes the expression sound like “be good” or “behave properly.”
TH: ถ้าอยากให้คนอื่นเคารพ ก็ต้องทำตัวดีๆ
EN: If you want others to respect you, you have to behave yourself.