If you want to configure the appearance of the search result and/or improve the search results, the views module offers you a quick and very easy way to do so. With this solution you can 1. configure how the results look like i.e. what kind of fields are displayed and how the display is arranged and 2. determine how the results should be filtered and sorted.
Step 1: Create a view with Page display
Step 2: Add the contexutal filter "Search: Search Terms"
Step 3: Add any filters and fields you might use
Step 4: Set the page path to search/node/%
Step 5: Use the "Format" section to configure the appearance