Complex sentence: Clubs like Tromsø, Fredrikstad and Aalesund wanted to sign Johansen who's contract expired after the season, but he signed a three-year contract with Strømsgodset in December 2010, and joined the club on a free transfer on 1 January 2011.
Split into simpler sentences: Clubs like Tromsø, Fredrikstad and Aalesund wanted to sign Johansen who's contract expired after the season. In December 2010, Johansen signed a three-year contract with Strømsgodset, and joined the club on a free transfer on 1 January 2011.