You could try to answer the following question : "What are the barriers for patient family members or relatives for escalating care of a deteriorating patient?", maybe first with a literature review and then maybe with some focus group interviews. Check with your supervisors what could be the best approach in your local setting.
The very best nursing research for undergraduates is a project that you have a personal interest in. What excites you most about nursing? Where can you see yourself in the future? This is what you should focus on.
I agree with Deborah that your level of research is a project type to enable you to learn the methodology. The topic of interest could be your observed emerging bio-psycho-socio cultural health issues in the community or study about the health education on Homebase self-care to the Out-patients / discharging patients.
Conforme Débora e Virgínia comentaram, você precisa ler bastante sobre o tema que te interessa na Enfermagem e observar a prática da profissão. A partir disso surgirão seus questionamentos ou perguntas de pesquisa, e você verá, junto a(o) orientador(a) a que se adequa à sua realidade.
It depends on your area of interest in nursing and what you want to contribute in the nursing practice. Read literature related to the topic of interest that you want to investigate.