Getting htm and pdf files as results when searching !!!

Hello Everybody

We are trying to implement a search capability in our EP6.0.

We have created only one index using the Trex Search as service in the Index Management.

When we try to search some terms , the results (list of result ) appear only as an htm page or pdf .

How can we implement that search in order to have the result as a portal page or iview .

Waiting for your ideas.

Thanks