Complex sentence: Unable to do so, they travel to Korea in order to find it; however, Quagmire falls in love with his former lover, Hee-Sun. Meanwhile, Stewie believes he might become a redhead.
Split into simpler sentences: Unable to do so, they travel to Korea in order to find it. However, Quagmire falls in love with his former lover Hee-Sun. Meanwhile, Stewie Griffin believes he might become a redhead.