Source Search

I do a lot of source searches. Normally I use iSphere source search.
I am trying to figure out how to do this search:
In the source it could have been coded several ways, three simple examples below:
dcl-f filea
dcl-f filea
dcl-f filea

If I do the search for 'dcl-f filea' I miss the last two.
If I put in three searches with an 'or' it would work but I have some and conditions also. And what if they put more spaces in-between them.
I guess what I need is some sort of wild card between dcl-f and filea.
I have been looking at Regular expression but cannot figure it out.

Any help would be appreciated.

Kerwin Crawford