//komenda wyszukanie hasła
        private void ExecuteSearchCommand(object obj)
        {
            var text = (string)obj;

            if (text != "")
            {
                var speller      = new PolishStemmer();
                var textWordData = (speller.lookup(text).toArray().FirstOrDefault() as WordData);

                if (textWordData != null)
                {
                    text = textWordData.getStem().toString();
                }

                Search(text.Trim().ToLower());
            }
        }