To search across the different forms you can select Keyword.
To narrow or broaden your search, you might use the options All Words, Any Words, or Exact Phrase in the following menu
When you enter one or more terms in the search box, you will be shown similar terms across subjects, places and people. You can select the desired term. If you need to add more than one term you can click on the link "Add another keyword search".
Upon selecting the terms you will see immediately the results
You can refine the results by using one of more filters as shown just below
In the Apply button, even before you click on it, a number will show you how many testimonies are retrieved using those search terms and filters.
Click on "Apply" when you are ready to view the results.
In the filters' row the "More" drop down menu will offer other filtering options