The literature search is an iterative process. The initial search string (or combination of keywords, symbols, and operators are that entered into the search box within a database or engine) will change as you revise your research question, review your search results, and refine your keywords.
This page offers guidance to help you build an initial search strategy, which is often recommended before going to a database. As you search, you should keep a record of keywords and phrases - both the combinations that produced relevant results and those that did not.
Visit the Research DIY page for more information the research process.
Using quotation marks in many databases will allow for the exact phrase to be searched. For example, a search for "college students" will tell the database to retrieve results where those two words are grouped together in that order, as opposed to results that reference college and students separately.
Often, using an asterisk (*) after the root of a word will broaden the retrieved results to include various word endings and spellings. For example, searching educat* retrieves articles that reference educate, education, and educating.