Tet is the most important traditional festival in Vietnam, also known as Vietnamese New Year. Besides Tet, this festival also has several other names, depending on the different regions in Vietnam and the ethnic groups that celebrate it. Here are some other names of Tet:

1. Nguyen Dan: This name is most commonly used in the North of Vietnam, where Tet is celebrated based on the lunar calendar.

2. Tet Nguyen Tieu: This name is used in the South of Vietnam, particularly in Ho Chi Minh City, to refer to the first full moon day of the lunar new year.

3. Tet Tao Quan: This name is used to refer to the Kitchen God Festival, which falls on the 23rd day of the twelfth lunar month, before Tet.

4. Tet Han Thuc: This name is used to refer to the Cold Food Festival, which falls on the third day of the third lunar month, after Tet.

5. Tet Doan Ngo: This name is used to refer to the Vietnamese Parasite-Killing Festival, which falls on the fifth day of the fifth lunar month, after Tet.

6. Tet Trung Thu: This name is used to refer to the Mid-Autumn Festival, which falls on the fifteenth day of the eighth lunar month, usually in September or October, after Tet.

These different names reflect the diversity and richness of Vietnamese culture and traditions, and the many different ways in which Tet is celebrated throughout the country.