Bye! 
Tạm biệt! * 005 like: Tạm biệt! → →
Auf Wiedersehen! ☊ Tạm biệt! ☊ 
☊ Bye! See you next week. ☊ bye ☊
Goodbye! It was great to meet you. ☊ goodbye ☊
Bye! Safe journey! (= used when sb is beginning a journey) ☊ journey ☊
Bye! Don't forget to write. ☊ write ☊