Alternatively there are two methods of conducting a forum search:
Native - using the search box near the top right of the forum page. This is useful for being able to restrict the search to only a specific section and/or topic titles rather than the full post text. Searching for a keyword within just the title of a topic will result in fewer hits, but the hits are more likely to be relevant. The native search refuses to search for strings of three letters or fewer, as a blanket ban on words such as "the", which would score a huge number of hits. It's a blunt instrument, but were stuck with it.
External - using your favourite search engine. For example: a Google search can be restricted to search results from the forum by prefixing the search term(s) with "site:hummy.tv/forum", eg site:hummy.tv/forum newbies guide. It would be difficult to restrict searches to topic titles this way, so the native search still has its uses, but the results filtering is much better and there is no restriction against three-letter search terms.