Implement a Custom Search Engine built on top of google.com

I want to build a webpage/ custom search engine that will take user input and then query google for the results, except that with a number of keywords I want to append some predefined strings that ( will be stored in a dictionary/file..).

I tried using a form and then submitting query to google, but I want to do it as beautifully (and much the same way) as these people have done. They just append Zlatan at the beginning , I want to append variable strings.

Any useful links, knowledge , suggestions, steps would be heartily appreciated.

THanks all !!