California agency reports can also be a useful source for information. The Agency Reports Search lets you search by keyword and see what agencies are working in a particular area. For example, foster youth turns up the Foster Youth Services Program, searching on that leads to their Reports and Publications, including the most recent Report to the Governor and Legislature.
Nexis Uni (formerly Lexis Nexis) lets you search across -- and then limit by -- a variety of sources including law reviews, State and Federal cases, statutes, administrative regulations, and much more.