Put each criterion in it's own Request.
One example in a script:
Enter Find Mode [ ]
Set field [ YourTable::field1 ; "=" ]
Set field [ YourTable::field2 ; "=" ]
Set field [ YourTable::field3 ; "=" ]
Perform Find [ ]
There are other options such as performing a find using field 1, then use extend found set two times with criteria specified for Field 2, then Field 3.
This can also be set up as stored criteria.
Thanks! Exactly what I was looking for.