Perhaps you should try some spelling variations:
level linkages » level languages, level images, level lines
linkages jason » languages jason, linkages among, linkages along
world level » word level, world even, world love
jason chung » jason chong, jason chen, jason huang
acm world » acmet world, raum world, wcom world
2008 acm » 2008 a, 2008 a2, 2008 a1