I have the following string in the content of one of my pages:

"The cats and dogs sleep."

and the folowing code to perform the MultipleCharacterWildcard examine search:

string keyword = "cats and dogs";
string[] phrasedKeyword = SplitQueryWithQualifiers(keyword, ' ', '\"', true);

            //generate Search Criterea           
            m_Searcher = ExamineManager.Instance.SearchProviderCollection["myindexToSearch"];
            Examine.SearchCriteria.IBooleanOperation filter;
            var criteria = m_Searcher.CreateSearchCriteria(IndexTypes.Content, Examine.SearchCriteria.BooleanOperation.Or);

            if (keyword != "")
            {
                filter = criteria.Field("umbracoNaviHide", "0");
            }
            else
            {
                filter = null;
            }

            for (i = 0; i < phrasedKeyword.Length; i++)
            {
                filter.And().GroupedOr(

                    new string[]
                    {
                        "nodeName",
                        "alternativeTitle",
                        "introText",
                        "bodyText",
                        "metaDescription",
                        "metaKeywords",
                        "FileTextContent"
                    },
                    new IExamineValue[]
                    {
                        phrasedKeyword[i].MultipleCharacterWildcard()
                    }

                );
            }

If I search using just 'cat' or 'dog' or 'cats' or 'cats dogs' the correct page is found.
As soon as I introduce the word 'and' e.g. 'cats and dogs' the page is no longer returned in the results.

I know words like and, a, I etc. get sripped out when the indeing is performed but how can I make the search work if they are entered by the user?