Find below:
1. Scholarly Literature Reviews on homelessness organized into categories (General, United States, California)
2. Google Scholar general search results in the same categories.
Remember that the literature review is an excellent place to start your reading in the body of literature on a specific topic or sub-topic. When reading pay attention to themes, authors cited, and always examine the bibliography for additional relevant sources.
Try also the following recommended search terms and phrases in Google Scholar:
poverty, economic insecurity, low income, poverty alleviation, poverty education, economic hardship, inequality, poor, etc.