In terms of searching the literature, you develop your qualitative research question first. Then, you can use the acronym SPIDER to help you identify the terms to search. Unlike quantitative research, there are no resources that provide filtered information for qualitative research. You will need to go to resources that provide unfiltered information to specifically find qualitative research.
SPIDER is an alternative system for defining a research question to PICO. For more information see
Cooke, A., Smith, D., & Booth, A. (2012, October 1, 2012). Beyond PICO: The SPIDER Tool for qualitative evidence synthesis. Qualitative Health Research, 22(10), 1435-1443. doi:10.1177/1049732312452938
P,I =Phenomen of Interest
EXAMPLE from Cooke et al above: