Syncing multiple audio tracks

Please help. I am creating a video where I am playing each part of a 9 part piece. I want to put them together which means lining up each entrance carefully. I know I can't have 9 separate audio/video tracks. That's fine. I'm going to combine them into small groups once they are synced. I am having a great deal of trouble getting the tracks to line up exactly. I can get them very close, but that's not good enough. It seems as though the tracks just want to start at a certain place and I'm not able to control that. They have to be exact. I am a novice user of Premiere Rush and I'm hoping this isn't too difficult to address. Thank you.