Perhaps you should try some spelling variations:
investigaciones cientificas » investigacion cientifica (Expand Search), investigaciones juridicas (Expand Search), investigaciones sociologicas (Expand Search)
politicas comparadas » politica comparada (Expand Search), politicos comparados (Expand Search), publicas comparadas (Expand Search)
de investigaciones » de investigacion (Expand Search), e investigacion (Expand Search), la investigacion (Expand Search)
consejo superior » ensino superior (Expand Search)
la politicas » las politicas (Expand Search), la politica (Expand Search), a politicas (Expand Search)
superior de » superior del (Expand Search)
unidas la » unidos la (Expand Search), unidas a (Expand Search), unidas y (Expand Search)