Find related terms and documents using Google by adding a tilde (~) to your search term. For example, Googling ~nutrition will return results with the words nutrition, food, and health in them.
You can find much more info here: advanced search operator cheat sheet.
Remove affiliate links from product searches. When you're sick of seeing duplicate product search results from the likes of eBay, Bizrate, Pricerunner, and Shopping.com, get rid of them by using Google advanced operators (like, -site:bizrate -site:ebay -site:shopping.com).
Or, try this site: Give Me Back My Google which removes known resellers from your search results.
