Dharamshala: Tibetan spiritual leader the Dalai Lama, who visited Mongolia on a five-day visit, said Mongolian Buddhists should pay more attention to studies as just chanting is not sufficient. Lama said the old monks in the region have to suffer a lot but still they were determined and managed to keep the Buddhist tradition alive there. He added that there is a need for atleast 20 to 30 years of serious study.