Hello Sunghou,
There is no safety manual for the MC33664 (TPL transceiver).
For BCCs (MC33771/MC33772), all safety related documentation is available on DocStore:
https://www.docstore.nxp.com/products?path=/content/docstore/product-hierarchy/Automotive-Battery-Ma...
…and requires an NDA (Non-Disclosure Agreement). If your company has not signed the NDA with NXP yet, please create a standard ticket/case for my colleagues who are in charge of the NDA process and can eventually help you with that.
Best regards,
Tomas