Getting more than 20 Facebook search results?

I am trying to search for nearby locations using the iOS Facebook Connect SDK. It successfully returns 20 nearby places, however I want it to return more than 20. I am currently using these parameters:

NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                       @"place", @"type",
                                       centerSt开发者_运维技巧ring, @"center",
                                       @"1000", @"distance", 

I have tried adding a "limit" parameter and setting it to something like 50, however I still get back the same array of 20 places. I tried playing with offset as well, and have noticed no difference. Anyone have any tips?

Maybe it is the limitation from server side. I never use Facebook connection SDK before. But it maybe the same story as what I meet in Google Places API

When I want to use Google Places to return all the results, I notice in the documentation there is a limitation for 20 return results: (http://code.google.com/apis/maps/documentation/places/#PlaceSearches)

Zero or more elements, each containing information about a single establishment. See Place Search Results for information about these results. The Places API returns up to 20 establishment results. Additionally, political results, or streets, may be returned which serve to identify the area of the request.

Hope this can help.