The Logic Studio Training Wiki has a search engine built in, which can be used to locate tutorials. A search box is located on every page, usually placed in the header on the right hand side of the page. It will take you to the article that matches your query; otherwise it displays the search results. To display the full search results, click on the last item in drop-down list (which says «containing...»), or perform an empty search.
This basic search box does not search categories. You can display a more advanced special search interface by doing a null search (with nothing in the search box, click on the magnifying glass or the "Go" button). Click on "Advanced" for an even more advanced interface that allows you to search categories, etc.
You can also search directly from your Web Browser.