... It has been shown [1], that in some cases, in chaos set A the sub-set B can exist, in which the chaos behavior can be stabilized by external parametrical perturbations. ... As the first step I've found the A set (the set of chaotic behavior) and as a second step, by using different parameters combination (that can be consider as parameter perturbations of the system) I've found the B set (the set, where some stable cycles exists). ... For the f(x)=ax(1-x) map this is [3,8 4,0] interval. ...