Try this site http://view.byu.edu It searches the BNC, one of the biggest corpora available, and will show collocations and colligations. It's worth playing with to get used to. I think it's one of the most useful sources on the web.
Hi, do you know any good online dictionary of collocations?
Thanks in advance,
Have you tried the Time corpus there too- it can produce some very interesting results if you look at buzz words and jargon.