Searching for "tea" brings up a variety of articles related to tea taxation, the Boston Tea party, and many others. As you're searching, consider what other words you can add to focus your search. Consider:
tea AND (manners OR customs OR etiquette)
tea AND culture
tea AND sugar
tea AND porcelain
These are just a few ideas to get you started. As you search, pay attention to the words that the authors or the database are using to describe the concept that you are interested in, and use those to guide your search.