Help please

Hello, professor.

I took the TOEFL Exam, and I got 93, I improved 5 points. In the speaking thanks to your advices I got 26.In the writing I got 23, I improved 2 points. I still need some help with the writing please. I'm looking to get 25 to 28 in the writing. What do you advice me to do in order to improve my score, even I'm able to take tutoring classes by skype if it's needed.

Thank you