It seems you're looking for a chrome extension that will crawl websites, or a certain website, based on your custom search needs. You mention PHP and Python which aren't languages that chrome extensions can be written in. Is it that you want this to be a chrome extension, or you want the located links to be open in chrome?
Whichever it is, I can do this job. I'll need you to provide for me a sample website that includes the content you're looking for and examples of some expected search terms and their results.
Once I have this I will begin putting together a prototype that implements this search and shows you some examples of the links found. This will be the first milestone and you can give feedback on whether the search features meet your expectations.
Then I will build the user interface through a chrome extension or whichever it is that you're looking for as the final deliverable.