Suppose you have a keyword containing "how to" such as "how to find car rental deals", and suppose also it has these fictive stats from the google keyword tool:
broad: 60k global monthly
phrase: 15k global monthly
Then, suppose you register "howtofindcarrentaldeals.com" to rank for that keyword.
If "how to" are stopwords, can they still help you target the 15k phrase search and give you an edge there? In other words, are stopwords only ignored in broad searches or are they also ignored in exact phrase searches?