Hi Bilen
You can't search directly on the form data. This is because the form data is stored as a BLOB in the database.
You will need to create simple variables (i.e. String, integer, etc). You then need to populate these from the form variables.
There are two options:
1. In the step after each User step, create a SetValue step that copies the data from the form to the simple variables.
2. Create a custom submit orchestration that does the same thing.
You may also want to look at our AddOn, the Enquiry Tool, which makes it quite a bit simpler to do searches on process data:
http://www.avoka.com/avoka/enquirytool.shtmlHoward