IS THICKER FULLER HAIR SHAMPOO AND CONDITIONER GOOD CURLY THINNING HAIR?

It's really trial and error to find the best shampoo and conditioner for you. For curly thinning hair I'd advise using a volume building shampoo and conditioner, yes. Also, it's best to change your shampoo and conditioner frequently for better effects, so I prefer to alternate between two different ones.