SQL & PL/SQL

I have a table type with one column and I want to create one with two columns.

My type is:
create or replace type "NUMBER_TABLE" as table of number;

And I uses it in function:

FUNCTION GetValues()
return NUMBER_TABLE
as
results NUMBER_TABLE := NUMBER_TABLE();
begin
select OrderId bulk collect into :results from(select * from tbl_orders);
--Some other code...
end;

I want the select be like that:
select OrderId, OrderAddress bulk collect into :results from(select * from tbl_orders);

How to do that?