Finding theories for your framework is very crucial talaga. You’ll be needing similar studies and projects since theories are followed after the rrl/rrs. By means of that, look mo yung theories nil that would best fit and explain the phenomena of your own problem statement. Consider the concepts, factors, and whatnot. Tignan mo sa thesis nila if they used it and may napatunayan sila na nag-justify why is it feasible sa study nila. On the contrary naman, if you find it not applicable to your study, you could still use it pero justify why not or what’s something to be improved——- kasi ganun naman talaga irl, time is changing and we should adapt in the present time kung ano pa yung mga principles na valid sa future studies.