Use the following keywords to identify qualitative research. These keywprds will search the titles, abstracts and keywords of records held in the databases. Use quotations to search as a phrase:
"constant comparative method"
Use controlled vocabulary
Databases use controlled vocabulary to categorize each record stored. The terms they use are known as thesaurus terms orsubject headings. The thesaurus terms vary for each database according to their indexing system.
For example, qualitative research is indexed in PubMed as "Qualitative Research" or "Nursing Methodology Research", while inCINAHL their subject heading "Qualitative Studies" is complemented by more detailed terms, including "Phenomenological Research" and "Grounded Theory".
Qualitative research filters are pre-formulated search strategies that have been constructed by librarians to help you retrieve articles in databases that deal with qualitative research. You can use the filter and then combine the results with your subject.