Nothing. As detailed in several other threads in theis forum, the ODP search engine normally updates on a weekly basis (after the RDF dump has been produced). Unfortently, due to technical difficulties, the RDF dump (and, therefore, the search engine database) has been been updated since the end of September.
ODP staff are aware of this problem and have made it their highest priority to get it fixed. Things are looking even more hopeful of it being fixed within the fortnight (hopefully with the next few days).
Oh - and, when it is up to date, you won't find it by searching for any keywords. It only indexes your site title, the category and your site's description. It does not store any "keywords" or other data.