Complex sentence: Although there is clear written instruction in the Four Tantra, the oral transmission of medical knowledge still remained a strong element in Tibetan Medicine, for example oral instruction may have been needed to know how to perform a moxibustion technique.
Split into simpler sentences: Although there is clear written instruction in the Four Tantra, the oral transmission of medical knowledge still remained a strong element in Tibetan Medicine. For example, oral instruction may have been needed to know how to perform a moxibustion technique.