You don't have a license for the ICDD PDF database, so you need to find an alternative. Fortunately this is a common and fairly simple structure - have you tried the Crystallography Open Database? If you search on the formula Ce O2 you will find a useful CIF file.
Dear Anindita Bhuyan, I have attached the files with the details on cubic zinc sulfide and MoO3 as per your inquiry. I hope these are useful in your research.