From the activities tab, you are able to use filters and search your activities by keyword(s).
Searching the Keyword in the Activities Tab
1) Navigate to the Day Planner section and select the activities tab.
2) From here, you will type in any keyword(s) in the search box at the top of the page. Any activities containing the chosen key word, will display below the search box.
Filtering
Click "More" to find a multitude of filtering options. Select as many or as little as you need to narrow down your search.