Hi all i am using umbraco 8.4 and i am trying to use examine to fine a news that don't has a specific widgets in their addToSection MNTP property i tried this

var widgetUdi = Udi.Create(Constants.UdiEntityType.Document,Umbraco.Content(156098).Key).ToString();
            if (ExamineManager.Instance.TryGetIndex("ExternalIndex", out var index))
            {
                var searcher = index.GetSearcher();
                ISearchResults results = null;
                IBooleanOperation queryOperations = searcher.CreateQuery().Field("__IndexType", "content").And().Field("__NodeTypeAlias", "newsItem");
                queryOperations = queryOperations.And().Field("path", newsSource.Path.ToString().MultipleCharacterWildcard());
                if(getPage.Value<IPublishedContent>("widget").Id!= 156098)
                {//here i'am trying to tell examine search in MNTP
                    queryOperations = queryOperations.Not().Field("addToSection",widgetUdi);
                }
                results = queryOperations
                                .OrderByDescending(new SortableField[]
                                {new SortableField("year",SortType.Int)
                                ,new SortableField("month",SortType.Int)
                                ,new SortableField("day",SortType.Int)
                                ,new SortableField("hour",SortType.Int)
                                ,new SortableField("minute",SortType.Int) })
                                .Execute(numberOfNewsToBeShown); 

and its work just if the multi node tree picker have one value but if its have more its not working so how can i tell the examine to search inside the mntp not compere whole of it ?