i need to retrieve the search result with any of three columns matched i have two method one is for count another one is for pagination but pagination method is not retrieving the result properly .i don know what mistake i did following is my code please correct me the mistakes

count method: for example total count is 25
FullTextSession fullTextSession = Search.getFullTextSession(session);
final QueryBuilder b = fullTextSession.getSearchFactory()
.buildQueryBuilder().forEntity(JobDetails.class).get();
org.apache.lucene.search.Query luceneQuery = b.keyword()
.onFields("jobId", "technology", "skills")
.matching(searchKey).createQuery();
int result= fullTextSession
.createFullTextQuery(luceneQuery).list().size();
System.out.println("result:"+result);

pagination Method : : for example first result is : 0 max result is :20
FullTextSession fullTextSession = Search.getFullTextSession(session);
final QueryBuilder b = fullTextSession.getSearchFactory()
.buildQueryBuilder().forEntity(JobDetails.class).get();
org.apache.lucene.search.Query luceneQuery = b.keyword()
.onFields("jobId", "technology", "skills")
.matching(searchKey).createQuery();
List<JobDetails> result = (List<JobDetails>)fullTextSession
.createFullTextQuery(luceneQuery)
.setFirstResult(firstResult)
.setMaxResults(maxResults).list();

System.out.println("Search job result size:"+result.size());

the expected result for the second pagination method for first page is 20 and second page is remaining 5 but its returning only 17 on first page so whats the problem :( please help me