[Children write messages of hope for passengers of missing Malaysia Airlines Flight MH370 at Kuala Lumpur International Airport]By Jonathan Barrett and Swati Pandey SYDNEY (Reuters) - Top searchers at the Dutch company leading the underwater hunt for Malaysia Airlines jet MH370 say they believe the plane may have glided down rather than dived in the final moments, meaning they have been scouring the wrong patch of ocean for two years. Searchers led by engineering group Fugro have been combing an area roughly the size of Greece for two years. "If it's not there, it means it's somewhere else," Fugro project director Paul Kennedy told Reuters.