BuddyPress Create Group Type provides two different types of search options to be displayed on Group Directory.
Access the search settings by navigating to WB Plugins > Group Type Settings > Group Type Search
This setting provides two different search templates:
Textbox [BuddyPress Group Search Textbox.]
Select this option to show the search text box on the Group directory.
Group Type Selectbox
Select this option to show Group Type Selectbox on BuddyPress Group Directory.
Both
Select this option to show both BuddyPress Group Search Textbox and Selectbox on BuddyPress Group Directory.