Complex sentence: In 1998 he returned to Denmark to play for FC København, where he reached a career highlight when FCK won the 2001 Superliga trophy, before he once more traveled abroad, this time to Germany to play for VfL Wolfsburg.
Split into simpler sentences: In 1998 he returned to Denmark to play for FC København, where he was a part of FCK's 2001 Superliga trophy winning team. He once more traveled abroad, this time to Germany to play for VfL Wolfsburg.