They want to find (out) the truth about me. ☊ 
Họ muốn tìm ra sự thật về tôi. ☊ Verbs 2.5 like: about me → →
Have you been talking about me behind my back? ☊ behind sb's back ☊
It never entered my head (= I never thought) that she would tell him about me. ☊ enter ☊
Don't worry about me—I can look after myself (= I don't need any help). ☊ look after yourself/sb/sth ☊
There are a lot of things she doesn't know about me. ☊ thing ☊
worry about sb/sth: Don't worry about me. I'll be all right. ☊ worry ☊