I would like to ask about hiring a car in Oxford and returning it in (or near) Great Bookham.
Simply enter your search details on the website, it will show you what is possible. Tick the box on the front page "return to a different location". If it is possible between thos locations it will show you available rental vehicles.
I tried that and it said "no results found for this location".
Then you have to choose a nearby location as that is a very small village in the UK.