List linked records not linked

[NitaiLS]

Hi, 

I'm looking for a way to create an interface that hold a list of records, that will display a required record only when looked for. kind of reverse filtering.

for example:

I have a list of of possible types of documents available to the customer.

I want the list to be empty, but when he fills a filter with a certain value (for example:invoice), the record called "invoice" will appear.

Any Suggestions?

Nitai