Hi @anon34139963, thanks for providing these details! I see what you mean, when you search by power BI, the results will show only the first closest tasks that include the exact sentence in your search. PowerBI is not included because it doesn’t have a space.
In order to find all tasks including completed tasks, please create an Advanced search report with more specific details of what you would like to search. For example: projects, completion status, etc.
If you still can’t get the right results after adding more details to your search, I recommend you to contact our support team and share the URL of the task so we can investigate further: How to contact our Support Team ✉
I hope this helps!