Put rice in a large bowl with enough water to cover by a few inches. Swirl with your fingers, then drain. Repeat until the water runs clear, about 3 times.
Stir together rice, 1 1/2 cups water, coconut cream, turmeric, and salt in a saucepan. Bring to a boil; reduce heat and simmer, covered, until rice is tender and liquid is absorbed, about 20 minutes. Chill, uncovered, 2 to 4 hours or overnight.
Heat coconut oil in a 12-inch skillet or wok over high heat. Add garlic; cook until it just begins to brown, about 1 minute. Add rice and spread in an even layer. Cook, without stirring, until lightly browned and crisp on the bottom, about 4 minutes. Add fish sauce. Cook, stirring, until fully combined and heated through, about 2 minutes.