Can mysql5.5 use match against usage?

Question

Can mysql5.5 use match against usage? Why did I test no data and return the data set: user_id user_tags1 Swimming running basketball 2 Football table tennis 3 Basketball shot put football 4 Swimming basketball football 5 Swimming table tennis SQL statement: SELECT *,MATCH (user_tags) against ('swimming football') as match_degree FROM user_tags WHERE MATCH (user_tags) against ('swimming football') order by match_degree desc limit 10