Search uses exact phrase search rather than keywords

**Issue by [rachelsquirrel](https://github.com/rachelsquirrel)**
_Monday Oct 05, 2015 at 18:42 GMT_

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Steps:
1. Create a new note with the words "Rachel loves bikes"
2. Search for the words "Rachel bikes"

The app can't find the note because it's searching for the exact phrase rather than notes which contain both Rachel and bikes. It doesn't work this way in the iOS app. In iOS searching for "Rachel bikes" will return the note with "Rachel loves bikes".

Reproduce the issue in the macOS app by creating a note containing “Rachel loves bikes” and searching for “Rachel bikes”. Inspect the macOS search implementation and compare its behavior with the iOS app; done means searches match notes containing the individual keywords rather than only the exact phrase.

Written by the indexing model from the issue text.