KNOWLEDGE OF THE COOKS IN COLLECTIVE KITCHENS OF KINDERGARTENS IN TIEN LANG DISTRICT, HAI PHONG IN 2015 100% of the cooks had proper knowledge about foods / specimens which should be preserved, 90.2% of them knew about the causes of food poisoning, 93.8% knew whom they should notified when a case of food poisoning happened; 89.3% knew about safe foods, 64.0% knew the reason causing unsafe foods, and 68.7% knew about the harms of unsafe foods.