In Ziyarat e Ashura there is a dua that is to be recited while in sajdah. I cannot remember it and it is not possible to read dua from paper and be in sajdah at the same time. Can I ommit that dua that is to be recited in sajdah. Will Ziarat e Ashura be incomplete without it?

You can get into the position of sajda in whichever way possible and recite the Dua from the paper