mình chưa hiểu lắm

Meaning

1. not understanding yet

   interjection

   I don't quite understand yet

   Chưa (not yet) is softer than không: it says you'll get there. To someone older: Em chưa hiểu lắm ạ.

   • Xin lỗi, mình chưa hiểu lắm. Bạn giải thích lại được không?

     Sorry, I don't quite understand. Could you explain again?

   • Câu này mình chưa hiểu lắm, bạn nói chậm lại nha.

     I don't quite understand this sentence yet, could you say it more slowly?