You can control whether lists are affected by name fragment matching in the Options > Preferences: Typing dialog box. The check box Match name fragments while typing controls whether name fragment matching is active or not, regardless of whether the project setting indicate that name fragments are indexed in the symbol database.
Type a space character in front of a name fragment to toggle name fragment matching for an individual case.
As a shortcut, you can toggle the use of name fragment matching by prefixing what you type with a space character. For example, if you turned name fragment matching off in the Options > Preferences: Typing dialog box, you can use it selectively by adding a space character in front of the name fragment you type.