To allow indexing and searches of special chars (all chars different than letters and numbers) those characters must be put in the GlobalConfig into the FullTextIndexedChars attribute.

Objects must be reindexed to apply the changes. After changes restart IIS and then recompute the objects.

http://tracking.teradp.com/gn4/issues/GN4-4378

Example with the underscore character

<GlobalConfig

xmlns="http://www.teradp.com/schemas/GN4/1/LoginContext.xsd"

CompletionTime="4:00:00"

ClientItemsPerPage="35"

StartDayTime="0:00:00"

UsersFolderPath="/system/users"

BingMapsKey="xyz"

FullTextIndexedChars="_">