I simply keep on pestering them!
Today I needed some info on a company listed on the Australian Stock Exchange, called "Deutsche Divers": apart from one stock analysis (with no further info) all I got were links to scuba diving sites and a few more stock tickers on page 3-4. Believe me: I tried all sorts of different ways, until no useful results for ["Deutsche Divers" +company -scuba] sent me straight to the link 'help us improve'!
In the meantime I had found on
MSN Search what I was looking for, and of course I told Google this (with search syntax).