This isn't google so don't bother putting things in quotes or adding modifiers like +,-, or % to your search terms. This is a straight up matching search - enter the word or phrase you are looking for and you'll get back anything that has that exact word of phrase. Use the radio buttons to help narrow your search.
example: If you want to find articles that are related to dwarves, try doing a title search for 'dwar'. That will return any article with 'dwarf' or 'dwarving' in the title. Of course it won't help you find an article called 'Dorfing 101', but that's life, sometimes you need to look a little harder to find what you want.
If you want to search just by keywords, tags, or categories, please try the Keyword/Category Search