remain cheerful in difficult circumstances = dũng cảm và tiếp tục; used to tell someone to make an effort to stay brave and confident when they are in a difficult situation.

"Keep your chin up, we're not lost yet!" Hãy dũng cảm và tiếp tục, chúng ta vẫn chưa mất hết!"

Chin up! It'll be over soon.

Keep your chin up! We'll get through this together!