Search engine efficiency / relevancy

In XWiki.org, I typed that query "syntax 2.0", and it returned nothing relevant for some one just trying to know how you proceed to make a bold with the new syntax (the on line link in 2.0 edit mode on 1.8 still leads to 1.0 syntax) . I think a simple way to find important information should be helpfull for users.
See screenshot attached.

P.S. : and thanks a lot for such a precise percentage information : 0.6904038 69.04038 69.04038 69.04038 69.04038 69%... so helpfull