You will generally use the Search on the Home Page if you do not know what Project the transcript you are looking for is in.
To start search you click on the Looking Glass icon in the top-right corner.
A text field opens, where you can write your search query and then hit enter to start the search.
If you want to search for an entire phrase you need enclose it in quotes, e.g., "project management"
The search results will be ordered by rank and will include a sample sentence matching the search query:
To exit the search you need to click the x in the corner of the search query box.