I understand search is very important functions for blog. There are three ways to search this blog; they are all at the right Side Bar.
1) WordPress Search: available at side bar (top right), a “word search” on all the posts, matched results will be shown on one page.
2) Google search: available at side bar, footer, and each post, it searches by the Google index. Note Google does the index once every 3 or 4 days. So sometimes you don’t get the latest result from google search.
3) Tags: I created “tags” for some of the posts, you can click on the “tags” to see related articles. Think this as the “index” at the end of a book.
Also I added “related posts” when you browse each post (click on the title of each post, then scroll down), hopefully this will help you navigate better 🙂