Combination Chemotherapy in Treating Patients With Stage III Ovarian Epithelial Cancer or Gastrointestinal Cancer

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug and giving them by intraperitoneal infusion may kill more tumor cells.
PURPOSE: Phase II trial to study the effectiveness of intraperitoneal combination chemotherapy in treating patients who have stage III ovarian epithelial cancer or gastrointestinal cancer.