The [Advanced search] and [Find as you type] utilities are based on index data. Before searching,
you'll need to build/update index data by selecting the [File - Maintenance - Update index] menu item.
Without index data, you'd want to try the [Find partial words] and/or [Use regular expression] option.
From v7.3 on, the [Auto-index] feature automatically updates index data while commiting changes to a database,
Nevertheless, you'd still want to periodically select the [File - maintenance - clear index data/update index data] menu item
to have a clean index data and reduce its file size.
myBase provides the [Tools - Diagnose file parser] utility
intended for end-users to diagnose if file parsers have appropriately been installed for specific document types on the system.