Onmyoji - manga translation

I've been working with Patrick Honnore on transliterating some Siddhaṃ mantras in a manga comic called Onmyoji. It is well known in Japan and has even featured in two feature films, but this will be the first translation into a European language (French). It's work in progress and quite fascinating as the mantras appear to be genuine mantras. However in some cases I've not been able to identify the mantra. I'll post them here and would like to hear from anyone who can identify them.

• oṃ pa dmo dbha vā ya svā hā
• oṃ śu ri ma ri ma ma ri ma ri śu śu ri svā hā
• oṃ a mṛ to dbha va hūṃ pha ṭ svā hā (I think this is a Hayagrīva mantra)

Ring any bells?