A String chunker that converts the text relevant to you into usable keywords.

>>>python chunk_string_test.py

By using first 3 paragraphs of wiki on batman and using words like bat, man, batman Here is the result

'cultural icon batman', 'liveaction batman feature', 'batman television series', 'icon batman', 'batman feature films', 'batthemed costume', 'retellings batmans', 'late batman television', 'book title batman', 'heroine batgirl', 'book superhero', 'possess superpowers', 'most superheroes', 'crimefighting partner robin'

So if you use a better and more used text you might end up getting keywords used by people to search your product.

You need to install nltk and a few more packages from nltk downloader.