Does anyone have any tips on playing with both hands?

I know what 당신 meant about the fustration of not being able to play a piece especially when 당신 practice all the time, I get this all the time!
The only tips I can think of is to make sure 당신 can play each hand seperately almost perfectly before 당신 try and play them together. Also I find 글쓰기 on the 음악 helps, like draw a line between the left and write hand notes if they're played at the same time 또는 if one hand is played first draw a slanted line from that note to the note in the other hand that is played afterwards (hope that makes sense?). Also play it really slowly at first. Hope any of that helps :D