TAS-102 Active Not Recruiting Phase 2 Trials for Metastatic Colorectal Carcinoma / Unresectable Carcinoma / Stage IVC Colorectal Cancer AJCC v8 / Stage IV Colorectal Cancer AJCC v8 / Stage IVA Colorectal Cancer AJCC v8 / Stage IVB Colorectal Cancer AJCC v8 Treatment