HELSINKI—Rescue teams searching for survivors four days after a landslide carried away homes in a Norwegian village found no signs of life Saturday amid the ruined buildings and debris. Three bodies have been recovered but searchers are still looking for seven more people believed to be missing. The landslide in the village of Ask is the worst in modern Norwegian history and has shocked citizens in the Nordic nation. Search teams patrolled with dogs as helicopters and drones with heat-detecting cameras flew amid harsh winter conditions over the ravaged hillside in Ask, a village of 5,000 people 25 kilometers (16 miles) northeast of Oslo. Norwegian police pledged not to scale down the search even though a rescue team from neighboring Sweden has already returned home. Local police chief Ida Melbo Oeystese said it may still be possible to find survivors in air pockets inside the destroyed buildings. “Medically, you can …