How to search in Google Calendar
Using the search function in Google Calendar is similar to searching on Google.com. To search for events on your calendars, use the search box at the top of the page. For example, if you're looking for an event that contains the word 'swimming,' type [ swimming ] in the search field and click the search icon.
You can expand or refine your searches using Google Calendar search options. Just click the down arrow in the search box (next to the search icon), complete the appropriate fields, and press Enter.
The search results will only contain events from calendars that are selected for viewing in your calendar list. (Calendars that are selected for viewing are highlighted by a colored bar. To select a calendar, simply click on the title in the calendar list.)