Complex sentence: Ziana Zain greatest achievements was in 1995 after she won the main award in Voice of Asia by defeating 24 contestants from 20 countries all over Asia at once had engraved her name in Malaysian Book of Records as the First Female Artist to Win International Competition.
Split into simpler sentences: Ziana Zain greatest achievements was in 1995 after she won the main award in Voice of Asia by defeating 24 contestants from 20 countries all over Asia. Because of her success, her name is engraved in Malaysian Book of Records as the First Female Artist to Win International Competition.