if (keyword != null && !keyword.isEmpty()) {
queryString.append(keyword);
}
listResult = new ArrayList<News>();
QueryOptions options = QueryOptions.newBuilder()
.setNumberFoundAccuracy(1000).build();
Query query = Query.newBuilder().setOptions(options)
.build(queryString.toString());
Results<ScoredDocument> docResult = INDEX.search(query);
totalResult = (int) docResult.getNumberFound();