Complex sentence: He has traveled Australia and the world training in Close Quarter Combat, specialising in Knife Combat and Unarmed Combat and his skills have been used both domestically and on foreign soil adding to his expertise in real world combat where Zen Ki Bo is based.
Split into simpler sentences: He has traveled Australia and the world training in Close Quarter Combat, specialising in Knife Combat and Unarmed Combat. His skills have been used both domestically and on foreign soil adding to his expertise in the real world where Zen Ki Bo is based.