gsung chos kyi 'khor lo mi 'dra ba bcu gnyis

Twelve Doctrinal Wheels of Buddha-Speech: the four outer wheels of the sutras, aphorisms in prose and verse, prophetic declarations and verse, the four inner wheels of extensive teachings, tales of past lives, legends and parables, and the four secret wheels of meaningful expressions, narratives, established instructions and marvelous events. See gsung rab yan lag bcu gnyis [RY]

twelve doctrinal wheels of speech [RY]

12 doctrinal wheels of buddha-speech, 12 branches of the scriptures [IW]