Thank you for the translation vovachan. I realize your transcript is not official, but is appreciated just the same.
This dialogue concerning the stabilizer certainly appears to point in the direction of rotation difficulties. The Captain appears to be concerned with thrust, yet this could be explained by a desire to accelerate to make the elevator more effective.
The FO's comment regarding the stabilizer is made after the FE's 230 speed callout. (what would be a realistic rotation speed?)The Captain's repetition of "takeoff" and the addition of "stabilizer" seem like commands. As to what the Captain was doing to cause the FO to ask him "what are you doing", I don't even have a guess.