Hasanni's family told investigators he vanished August 10 near the store where his foster mother works on College Avenue in the Rockridge neighborhood.
Police haven't revealed if searches of several locations have turned up any leads.
That includes a search of Hasanni's foster parents' home in Fremont.
Hasanni's family plans to keep holding vigils for him every Monday in Rockridge until he is found.
A $10,000 reward is being offered in the case.