Complex sentence: He brought the club back to the Eredivisie in 1993, reaching second place in the Eredivisie with Heerenveen in 1999, thus qualifying for the UEFA Champions League for the first time in the club's history.
Split into simpler sentences: He brought the club back to the Eredivisie in 1993. In 1999 he reached second place in the Eredivisie with Heerenveen and thus qualified for the Uefa Champions League for the first time in the club's history.