Perhaps it would help if you were able to tell us exactly what you are hoping to achieve? Provide an example?
RoboHelp does offer Varaibles. Variables may be formatted and they may be included inside Snippets. But I don't believe it's possible to embed one snippet inside another.
Basically I'm trying to reuse text in defferent topics that would include tables formated with CSS. I understand that you can include variables in snippets but for some reason variables will not display tables even though there is CSS tied to them (tables).
The ultimate goal is to create individual snippets and include them in snippet sets.