Gia Nghia (Gia Nghĩa) is in Dak Nong Province, Central Highlands (Vietnam).
Gia Nghia is pronounced sort of like Zee-on-gee-ah. Very few foreign travelers come here, but the city is very nice, clean, and has good scenery.
Get on a motorbike (not sure about rentals) and drive to the tea plantation found around here.
There are many hotels around town.
Khach San Ho Tay is family run hotel in a nice location and is a good place to stay for about 160,000 to 200,000 per night.