Google Scholar provides a few advanced search options, including limiting your search by author, publication, and publication date. In order to access these advanced search tools, click on the triangle found at the far right of the Google Scholar search box.
Google Scholar provides two tools for browsing scholarly literature related to an article you have already discovered.
Cited by provides a list of articles that reference an article. Articles that reference an article that you find relevant to your research could very well be useful to you as well.
Related articles provides a list of articles covering topics and subjects covered it by the original article. This feature can be useful for browsing scholarly literature that Google Scholar considers similar to a known article.
The Cited by and Related articles features are found beneath the short description of articles on the Google Scholar search results page.