Final answer:
The 5th and 6th TNTT Principles/Tam Niem are Loyalty and Cooperation in Vietnamese and English, respectively.
Step-by-step explanation:
In Vietnamese:
- Loyalty: Tinh Thần Trung Thành
- Cooperation: Tinh Thần Hợp Tác
In English:
- Loyalty: Spirit of Loyalty
- Cooperation: Spirit of Cooperation
These principles are important in the youth organization of TNTT (Thanh Niên Thành Tựu), which focuses on personal development, community service, and spiritual growth.