Google AJAX Api limitations

Google is focusing on AJAX API and discontinuing the SOAP API.Google AJAX Api limits the number of results to a max of eight results per query . If the users want to view more results, they are diverted to Google.com. Pagination and providing a way for users to view more than eight search results without leaving the site is the most requested feature. Displaying just 8 results severely limits any serious use of the AJAX Api. So far, google is not been responding. Perhaps its a business decision or the feature is difficult to support, other wise Google has been quick in responding to feature requests.

A recent post by a user on google-Ajax search forum sums it up pretty nice

I keep seeing people ask for more than 8 results and pagination.
Please keep in mind that it is not a technical issue why Google hasn't
added this feature...it's a sound business decision on Google's part.
The AJAX Search API is designed to ultimately drive more traffic to
Google. By giving sites the ability to display every single result
would cause other users to visit Google less often.

Google is too smart of a company to create a bunch of mini-googles that
could ultimately drive traffic away from the parent site.

There is a feature request listed on the issue tracker and no fix is planned for this issue.

More about it here.