In the screenshot below, note the "Show All..." link. Selecting "Show All" (or pressing Enter) will take you to a search page with more search options.
Advanced Search Options
Selecting the "Advanced Search Options" link under the search box provides three additional search options, which are explained below:
In the "Search Results" section, you can sort the results by Most Relevant, Highest Rated, Most Recent or Alphabetical.
The default location for the search box on a blog page is in the right sidebar, as displayed in the screenshot to the right. You can search the current blog that you are viewing, or you can select the "Search all blogs" option.