订货 is a verb-object compound meaning 'to order goods' or 'to place an order'. It is a separable verb (离合词): the object 货 can separate from 订 when aspect markers (了), measure words, or modifiers are inserted, as in 订了货 ('placed the order') or 订一批货 ('order a batch of goods'). The person or company you order from is introduced with 向 or 跟: 向厂家订货 ('order goods from the factory').