Complex sentence: He also played in England with West Ham United on loan, but managed just four substitute appearances in his three-month stint; upon his return to Lisbon, he notably scored a hat-trick in a 6--3 win at S.C. Campomaiorense.
Split into simpler sentences: He also played in England with West Ham United on loan, but managed just four substitute appearances during his three-month stay. Upon his return to Lisbon, he notably scored a hat-trick in a 6--3 win at S.C. Campomaiorense.