Complex sentence: Morais started his career at hometown F.C. Penafiel, but in August 2004 was signed by England's Chelsea F.C. for an undisclosed fee, in a three-year contract after a successful trial period.
Split into simpler sentences: Morais started his career at F.C. Penafiel, but in August 2004 was signed by English side Chelsea for an undisclosed fee. Morais signed a three-year contract after a successful trial period.