I think I have tried hard but the fact remains that I still couldn't t get a satisfactory result on the exam.

我认为我已经努力了，但事实是我仍然不能得到一个满意的考试成绩。

I want a satisfactory result.

我想要一个满意的成绩。

Based on my experience, both methods achieved the same satisfactory result.

根据我的经验，这两种方法都能够获得令人满意的结果。