mergedServices.QueryBucket.questionMatch C# (CSharp) Method

        private string questionMatch(string input)
        {
            input = input.ToLower();
            questionLeft = questionLeft.ToLower();
            //list that will hold the permutaitons of the string
            List<customMatchObject> permutations = getPermutations(questionLeft);
            input = input.Trim();
            input = input.Insert(0, " ");
            input = input.Insert(input.Length, " ");

            //trimming the questionLeft
            questionLeft = questionLeft.Trim();
            questionLeft = questionLeft.Insert(0, " ");
            questionLeft = questionLeft.Insert(questionLeft.Length, " ");

            //looping through all permutations
            foreach (var item in permutations)
            {
                //if a word is found, it's removed from all the questionLeft variable also with it's components
                //ex: Mac book would remove Macbook, Mac, book from the questionleft
                if ((input.Contains(" " + (item.word) + " ")))
                {
                    questionLeft = questionLeft.Replace(" " + item.word + " ", " ");

                    foreach (var wd in item.wordsUsed)
                    {
                        if (questionLeft.Contains(" " + wd + " "))
                            questionLeft = questionLeft.Replace(" " + wd + " ", " ");
                    }

                }

            }
            while (questionLeft.Contains("  "))
                questionLeft = questionLeft.Replace("  ", " ");
            questionLeft = questionLeft.Trim();

            return questionLeft;
        }