These are some trial papers that I had found. They are from years before the new STPM system started, so all the questions from Semester 1 to Semester 3 are combined in 1 trial paper. What I used to do is that I will read through the questions and determine which are the ones that are currently in my syllabus and print those questions and answers out. It is not that hard as usually the questions for Semester 1 are usually in the front, followed by questions for Semester 2 and so on. Good luck guys!