(NECN/ABC) - The Greek rescue team that pulled an 11-day survivor from the rubble Saturday was back at it Sunday, on the hope that more people might be alive beneath the Hotel Napoli. Saturday they found 24-year old Richmond Exantus under the ruins of his shop. Doctors say Richmond is doing fine -- greatly improved from Saturday. Richmond says he survived by diving under a desk when the hotel came falling down upon him. He found soft drinks and potato chips and lived off them until he ran out three days ago. But he urged the rescuers to go back and find others like him who he believes might still be alive, trapped in a survivable space like he was. Saturday, Haiti declared an end to the search and rescue phase of the relief effort. Scattered miracles are welcome, but Haiti must turn its concern to the hundreds of thousands left injured and homeless by the quake. The U.N. stepped up its relief efforts distributing food, water, and supplies to the many homeless. It's a worldwide effort with troops from Brazil and Spain helping out, and especially U.S. Marines. Their beachhead landing to deliver supplies was reminiscent of many of the Marine Corps finest moments. And surely this will be one of them. Arriving back in Port-au-Prince Sunday, Haiti's biggest musician, Wyclef Jean, said he is concerned about the long-term commitment to Haiti. "There's going to be a Phase II, which is going to lead to more devastation and, I feel before that happens, that we need to identify a few tent cities that can actually become sustainable homes," Jean said. Meanwhile, in this deeply religious country, thousands flocked to outdoor masses Sunday to give thanks for what little they have left. ABC's Brad Wheelis reports. Video from the APTN used in this report.