Using Multiple Criteria with a CustomRecordSearchBasic

@operator=SearchMultiSelectFieldOperator

   CustomRecordSearchBasic srch = new CustomRecordSearchBasic();     // Define custom record type  RecordRef recordType = new RecordRef();  // Set record type internal id  recordType.internalId = "11";  srch.recType = recordType;     // customfield search  SearchCustomField [] scf = new SearchCustomField[1];     // Transaction Reference Id  SearchMultiSelectCustomField smscf = new SearchMultiSelectCustomField();  smscf.operatorSpecified=true;  smscf.@operator=SearchMultiSelectFieldOperator.any Of;     // Custom field internal id  smscf.internalId="custrecordmytranid";     // Set search values  ListOrRecordRef [] myOrders = new ListOrRecordRef[1];  ListOrRecordRef oneOrder = new ListOrRecordRef();  oneOrder.internalId="117";  myOrders[0] = oneOrder;  smscf.searchValue = myOrders;     scf[0] = smscf;  srch.customFieldList = scf; 

This code snippet displays a search based a single field value. I wish to add another SearchMultiSelectCustomField to the search object so that I am searching on two fields and the same time. Can someone show how and where this SearchMultiSelectCustomField should be added to the search?