Hair removal creams, such as Nair, only dissolve the hair below the surface of the skin. The hair follicle is not affected and will grow back. Using a hair removal creams are slightly better than shaving. Waxing remove the entire hair, roots and all, but it will grow back because the hair follicle is not destroyed. For temporary hair removal, creams and waxing are very effective.
For permanent results, you need any or all of laser, electrolysis or HRT.