Here's how you can customize the things Spotlight searches for in iOS 7.
1. Go to Settings.
2. Go to General.
3. Go to Spotlight Search.
4. You'll see a list of search categories.
5. Just tap to keep or remove a category from Spotlight's search results in iOS 7.
Personally, I prefer to leave all of the default search categories, but your mileage may vary. There may be some categories that you simply don't want to see in Spotlight's search results.
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