lucene - NOT 演算子がクエリ lucene で機能しない

Question

lucene バージョン 3.0.3.0 を使用していますが、検索した一部の式が正しく機能しません。たとえば、フィールド「Model」で「!Fiesta OR Astra」を検索すると、「vauxhallAstra」のみが返され、「fordFocus」は返されません。私のコードは以下です：

var fordFiesta = new Document();

        fordFiesta.Add(new Field("Id", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));

        fordFiesta.Add(new Field("Make", "Ford", Field.Store.YES, Field.Index.ANALYZED));

        fordFiesta.Add(new Field("Model", "Fiesta", Field.Store.YES, Field.Index.ANALYZED));



        var fordFocus = new Document();

        fordFocus.Add(new Field("Id", "2", Field.Store.YES, Field.Index.NOT_ANALYZED));

        fordFocus.Add(new Field("Make", "Ford", Field.Store.YES, Field.Index.ANALYZED));

        fordFocus.Add(new Field("Model", "Focus", Field.Store.YES, Field.Index.ANALYZED));



        var vauxhallAstra = new Document();

        vauxhallAstra.Add(new Field("Id", "3", Field.Store.YES, Field.Index.NOT_ANALYZED));

        vauxhallAstra.Add(new Field("Make", "Vauxhall", Field.Store.YES, Field.Index.ANALYZED));

        vauxhallAstra.Add(new Field("Model", "Astra", Field.Store.YES, Field.Index.ANALYZED));







        Directory directory = FSDirectory.Open(new DirectoryInfo(Environment.CurrentDirectory + "\\LuceneIndex"));

        Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);





        var writer = new IndexWriter(directory, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

        writer.AddDocument(fordFiesta);

        writer.AddDocument(fordFocus);

        writer.AddDocument(vauxhallAstra);


        writer.Optimize();                       

        writer.Close();

        IndexReader indexReader = IndexReader.Open(directory, true);
        Searcher indexSearch = new IndexSearcher(indexReader);

        var queryParser = new QueryParser(Version.LUCENE_30, "Model", analyzer);
        var query = queryParser.Parse("!Fiesta OR Astra");

        Console.WriteLine("Searching for: " + query.ToString());
        TopDocs resultDocs = indexSearch.Search(query, 200);            
        Console.WriteLine("Results Found: " + resultDocs.MaxScore);

        var hits = resultDocs.ScoreDocs;
        foreach (var hit in hits)
        {
            var documentFromSearcher = indexSearch.Doc(hit.Doc);
            Console.WriteLine(documentFromSearcher.Get("Make") + " " + documentFromSearcher.Get("Model"));
        }

        indexSearch.Close();
        directory.Close();

        Console.ReadKey();