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When you're searching for something on the Web using any search engine, put quotes around phrases that must be searched together. For example, if you put quotes around "electric cars", Google won't waste your time finding one set of Web pages containing the word electric and another set containing the word cars.
You can also use the plus (+) and minus (-) sign to your advantage. If you want to search for tips on how to get the most out of your iPad, you can search "ipad + tips". Use the minus sign similarly, to further narrow down your query.