If qualitative study need not a theoretical framework what will be the basis of putting data analyses. Is it so that issues and themes that are found in data will have to be put in place to link literature? Is it quite enough for PhD study?
The following papers should be helpful to your topic:
Green, H. (2014). The Use of Theoretical and Conceptual Frameworks in Qualitative Research. Nurse Researcher, 21, 6, pp. 34-38.
Jabareen, Y. (2009). Building a Conceptual Framework: Philosophy, Definitions, and Procedure. International Journal of Qualitative Methods, 8, 4, pp. 49-62.
Malterud, K. (2001). Qualitative research: standards, challenges, and guidelines. The lancet, 358, 9280, pp. 483-488.
Rocco, T. S. and Plakhotnik, M. S. (2009). Literature reviews, conceptual frameworks, and theoretical frameworks: Terms, functions, and distinctions. Human Resource Development Review, 8, 1, pp. 120-130.