You can search the Embryo Project Encyclopedia by clicking on Search in the top navigation bar. You will see a simple search box. The search will return all items containing all of the words you enter in the search box. If you place quotation marks around a phrase you enter in the search box, the search will return items containing only that exact phrase.
Your results will be presented in a list ranked by relevancy. Along the right-hand side of the screen are facets that allow you to filter the search results by subject or by type of object.