Bibliographic Research is one of the principles that govern the preparation of bibliographic work (preparation of bibliography). For the bibliographer, this principle refers to the method that involves the activity that supposes a clearly formulated and objectively tested hypothesis (for example, through studies of use and users of information or biblioographic work on demand). Bibliographic research can be supported by bibliometric analyzes resulting from the application of statistics to bibliography, thus constituting the approach that guarantees bibliography its scientific category.

You need to have a clear goal for your research, which usually involves a problem-based research question or thesis statement that focuses narrowly on the issue you want to address. See this presentation to understand and learn how to develop a research problem that will state a specific goal: https://prezi.com/view/kzN4ttLLBgoIHcKuBSTv/