looking for a story

Hi,
last week I remembered a story I read some time ago and wanted to reread it, only to find I couldn't remember the title.
The only things remaining are some details and an idea of what the name of the main characters may be.
I tried searching for it, but without sufficient info to feed the search engines and without a clue on which site it was on, I can only sift through ever single story on the sites I think it could be.
I hope that someone can make some sense of the bits and pieces I remember and can give me a title or even a link.

Here is what I know:
- it should be split up into at least two long separate entries
- possible name of two main charaters: lian hua (the name describes both of them)
- age: teens
- they are siblings (brother & sister => two sisters(change rather early in the story))
- they've got some sort of primal instinct which they have to master
- to help them they get trained in some kind of martial arts by their fathers teacher
- their friends also develope/have different talents concerning martial arts
- both get very long hair during the story into which they weave knifes
- their best friend learns some kind of drunken fist style from their father

I hope that for someone this is enough to remember it. :)
If you think you know what I am looking for but aren't shure, please ask me yes/no questions, usually I remember such things only after i've heard or read them again.

I'll continue searching myself , but I hope someone can spare me going over every story on BCTS and FM together. ^_^

Miri