Coach must understand own work firs

Coach must understand own work first. Then, coach have to understand both จุดอ่อน และจุดแข็ง ของตัวเองและ coachee เข้าใจธรรมชาติของคนมี difference background, difference level of learning

Results (English) 1:

Coach must understand own work first, Then have to understand coach. both the weaknesses and strengths of the coachee myself and understand the nature of difference, difference level of learning background.

Results (English) 2:

Coach must understand own work first. Then, coach have to understand both the strengths and weaknesses of yourself and coachee understand the nature of a difference background, difference level of learning.

Results (English) 3:

Coach must understand own work first. Then coach have, to understand both strengths and weaknesses of their own, and coachee understand the nature of the people Difference background difference level, of learning.