Search Function improvements?

Now that we have several blog entries posted, we decided to test the search function. Knowing that there are several posts with "essence report" that is relevant, we searched for both essence report and "essence report." Without quotes, 22 entries came up. With quotes, 2 came up. Both sets of results are impractical. Without quotes searches for both words, and with quotes it isn't giving accurate results (there are more than 2 blog entries with that phrase.)

What can I do to improve the search function, or replace it?