The search feature is using Google to search Less Wrong pages. It seems to trip up over the fact the same data is included in several different pages, a comment shows up on the article page, permalinks to the comment and comments nearby in the tree, recent comment lists, and the authors comment and combined history.

It would be nice to have a search feature that searched on the database rather than the website, using an algorithm that understands the structure of the data, and could return the best link to show the data it finds, just the link to the comment or article. This however would require writing search functionality rather than using a tool freely provided by Google.