Perhaps you should try some spelling variations:
investigaciones cientificas » investigacion cientifica (Expand Search), investigaciones juridicas (Expand Search), investigaciones sociologicas (Expand Search)
publicas comparadas » publica comparada (Expand Search), publico comparado (Expand Search)
de investigaciones » de investigacion (Expand Search), e investigacion (Expand Search), la investigacion (Expand Search)
consejo superior » ensino superior (Expand Search)
superior de » superior del (Expand Search)
de publicas » de publicar (Expand Search), de publica (Expand Search), de republicas (Expand Search)
unidad de » comunidad de (Expand Search)