You can use Pan-Cancer Analysis Platform http://starbase.sysu.edu.cn/panCancer.php . It provided expression profiles of ncRNAs (miRNAs, lncRNAs, snoRNAs, pseudogenes, etc.) and protein-coding genes across 32 cancer types ( ~10,000 RNA-seq and ~9,900 miRNA-seq samples) integrated from TCGA project. It also provided survival, differential expression and co-expression analysis platforms for miRNAs and genes (lncRNAs, mRNAs, ncRNAs, pseudogenes, etc.).