How to create a po from one supplier and many departments

I cannot find a way to create a PO based on 1 supplier and multiple departments. I tried the following but they don't work.
Department Name = Dept1
OR Department Name = Dept2
OR Department Name = Dept3
AND Supplier Name = Supplier1
(Department Name = Dept1
OR Department Name = Dept2
OR Department Name = Dept3)
AND Supplier Name = Supplier1
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