Complex sentence: However, his time in Munich was not a successful one and he returned to Switzerland to play in Bern for BSC Young Boys then to FC Wil followed by a stay in Lichtenstein playing for FC Vaduz until finally he settled in Aargau playing for FC Aarau.
Split into simpler sentences: However, his time in Munich was not a successful one and he returned to Switzerland. Since leaving FC Bayern Sandro has spent time in Bern for BSC Young Boys then in FC Wil followed by a stay in Lichtenstein playing for FC Vaduz until finally he settled in Aargau playing for FC Aarau.