This may sound crazy, but make a list of fairly random words, and add one of them to the end of your search.
I was researching the old London riddle once and added the word gondola. It had absolutely nothing to do with the riddle or the information I was searching for and yet the information I needed was number one in the google search
I was trying to find out what a J59 was and it turns out it was what the transformer hound turned into. Doing a seach for J59 alone just returned all sorts of useless information.
It may sound like I had a lucky break, but the reason it works is that it filters out a whole load of google rubbish and may provide some extra tips for your search, or avenues that you hadn't thought of.