I. To determine the tolerability and maximum tolerated dose of Sorafenib (sorafenib tosylate) when given orally in combination with Bevacizumab in patients with renal cell carcinoma (RCC). (Phase I) II. To estimate the objective response rate of advanced RCC receiving the combination therapy of Bevacizumab and Sorafenib. (Phase II) III. To estimate the progression-free survival of advanced renal cell carcinoma patients to Sorafenib (sorafenib tosylate) in combination with Bevacizumab. (Phase II)