regexp match string with word1 and not word2

[Flyzone]

Hello,
i have again problem with regexp :-P
I need to match all lines that contain one word but not contain
another.
Like to do "grep one | grep -v two:"
The syntax of the string is:
(any printable char)two:(any printable char)one(any printable char)
Example:
Apr 30 00:00:09 v890neg0 two: [ID 702911 daemon.one] findings:
blablabla

I tried with:
.*[^t][^w][^o].*one.*
but is not working, the string is always match and in other tries
using "less logic" i get always some different match :-(

P.S: i can't have more re.search, so i just need ONE regexp