To ask "What team has won the game?' in Spanish you must say:'Que equipo ha ganado el partido?'
The vocabulary is:
Que: (Pronoun) What
equipo: (noun) team
ha (verb): to have
ganado: (verb) win
el: (article) the
partido: (noun) game (use it for football or a similar sport, if you mean 'game' for children's game you must say 'el juego' instead or 'la partida')