Búsqueda por tesauros en línea

ex: 
System.Data.OleDb.OleDbException (0x80040E14): Syntax error in query expression 'nName LIKE ''%' AND NOT EXISTS (SELECT * FROM tRelations WHERE rleft=nKey AND rType='USE')'.
   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
   at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
   at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
   at System.Data.OleDb.OleDbCommand.ExecuteScalar()
   at CatIA.Thes.ListColumnsTerms(String strWhere)