Sorry, what I ment to say is that I'm creating a saved search but unfortunately the vendor codes are being shown even when it's not on the Purchas Order. I tried the criteria suite answers gave me ,
Criteria tab: Type = Purchase Order
Formula(Numeric) > Formula: DECODE({item.othervendor},{vendor.entityid},1,0) > Value = 1 > click Set
but I'm not pulling any results for this criteria.