[development] index/search user fields in D7

[Serhat Sevki Dincer]

Greetings,

I have added some fields to my users, field_interests and field_bio. I
want to be able to index/search users using data in these two fields.
Included search module in D7 allows to index/search only on usernames
and email addresses for users. I'm not looking for a fancy solution
like Solr, I have a small site; I just want to search my users with
words from their interests or bio. How can I do this? This is exactly
the same thing for the search module when it is -not users but- nodes.
custom_search does not seem to be doing it. Is there any D7 compatible
module to do this?

Thanks,
Serhat