Search Sales Order does not return the Item List

@operator

I have a function to search Sales Orders within a specific date, like this:

 public static nsRef.Record[] searchAllSalesOrderByDate()  {      nsRef.Record[] salesOrder = null;        nsRef.NetSuiteService wsNetSuite = AgMembership.getServiceLogin();        nsRef.TransactionSearch tranSearch = new nsRef.TransactionSearch();        nsRef.SearchDateField dateField= new nsRef.SearchDateField();      dateField.@operator = nsRef.SearchDateFieldOperator.within;      dateField.operatorSpecified = true;      dateField.searchValue = DateTime.Now.AddDays(-1);      dateField.searchValue2 = DateTime.Now;        dateField.searchValueSpecified = true;      dateField.searchValue2Specified = true;        nsRef.SearchEnumMultiSelectField type =                                            new nsRef.SearchEnumMultiSelectField();      type.@operator = nsRef.SearchEnumMultiSelectFieldOperator.@anyOf;      type.operatorSpecified = true;      String[] arrType = new String[1];      arrType[0] = nsRef.RecordType.salesOrder.ToString();      type.searchValue = arrType;        nsRef.TransactionSearchBasic tranBasic =                                             new nsRef.TransactionSearchBasic();      tranBasic.dateCreated = dateField;      tranBasic.type = type;      tranSearch.basic = tranBasic;        nsRef.SearchResult res = wsNetSuite.search(tranSearch);        if (res.status.isSuccess)      {          if (res.recordList != null)          {              salesOrder = res.recordList;          }       }         if (closeConnection)       {          //logout user          wsNetSuite.logout();       }           return salesOrder;     }