Step 1: Choose your research topic.
Step 2: Turn your research topic into a research question.
Step 3: Select keywords from your research question.
Step 4: Generate synonyms and related terms from your keywords.
Step 5: Combine them with Boolean operators.
Using the Advanced Search features can help you limit by last update, site or domain (e.g., .com, .edu, .gov, .org, etc.), file type, more.
You can also preview magazines in addition to books in Google Books.
Google Scholar is a great place to search for open access journal articles and others that are indexed within subscription databases.