Training maintenance aids hearing in tutorials

[/b] I can not found about Training maintenance aids hearing in tutorials and not good youtube because short and cut short but not completely. any help me. thank you and best wish.
Answer #1
Sorry, I don’t hear you too well..
Are you talking about hearing aids or have you got your words out of order ?
Answer #2
no, my friend is deaf, he can not hearing, he work a maintenance aids hearing mean aids hearing is problem and he fix it,, he wants learn maintenance aids hearing more well, still him little knows it. I help him search download training aids hearing in video but i can not found video training aids hearing.
fix aids hearing and clean aids hearing.
Answer #3
Nel replied: Sorry, I don't hear you too well..
Are you talking about hearing aids or have you got your words out of order ?
no, my friend is deaf, he can not hearing, he work a maintenance aids hearing mean aids hearing is problem and he fix it,, he wants learn maintenance aids hearing more well, still him little knows it. I help him search download training aids hearing in video but i can not found video training aids hearing.
fix aids hearing and clean aids hearing.
Answer #4
any one can help me?