I'm using parental control and can see browsing history fine, but it appears to only store a limited number of items. 

Is there a setting for this somewhere?

The problem is that for a mobile device during active browsing you only can see about the last hour or so of activity before it stops displaying. This is even further limited because every call is logged ie apple services that run about every 15 minutes.

This feature is pretty useless as is, unless there is a setting somewhere to display more items.