adding extra white

[Fulko van Westrenen]

Hello,

The more I typeset, the more questions I have. 
I would like to add some extra white between groups of notes,
small melodical patterns. At the moment I do that using \bar"",
but the white is very small, I cannot ajust it, and it feels 
clumbsy. Is there something like the LaTeX \hspace{} in lilypond?


Thanks,
Fulko