Final answer:
The 7th and 8th principles of TNTT (Tam Niem) are not provided in the referenced work, which is unrelated to TNTT's principles. Accurate information would require consulting specific TNTT resources.
Step-by-step explanation:
The 7th and 8th principles, or Tam Niem, of TNTT (Thiếu Nhi Thánh Thể, which translates to Eucharistic Youth Movement) are not available in the provided reference. The reference pertains to a work by Nguyen, Hieu Minh titled "The Study" and "White Boy Time Machine: Override" which is unrelated to TNTT principles. TNTT's principles, generally centered around Catholic teachings and Vietnamese cultural preservation, would typically reflect the organization's values and mission in faith and personal development for its youth members. To obtain the specific 7th and 8th Tam Niem of TNTT, one would need to consult resources or documents directly related to the Thiếu Nhi Thánh Thể organization.