Simplify your search by making keyword lists for your topic.
Author or writer
Title of work
Method of literary criticism
Be prepared to broaden or narrow your search.
If you want to research a minor work, you may find few critics' analysis you can use to support your ideas. You may have to broaden your search to find general articles about the author or their body of work.
If your ideas are to broad or you only have one keyword, think about another perspective of the work that you want to explore.