Perhaps you should try some spelling variations:
"cuadernos politicas sociales. persona ;" » "cuadernos practicos sociales. persona ;", "cuadernos politica social. persona ;"
"cuadernos practicas bolonia. personas ;" » "cuadernos practicos bolonia. personas ;", "cuaderno practico bolonia. personas ;", "cuadernos didacticos bolonia. personas ;", "cuadernos practica colonial. personas ;", "cuadernos practicas coloniales. personas ;"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("cuadernos politicas sociales. persona ;") OR ("cuadernos practicas bolonia. personas ;"))~.
• Removing quotes may allow a broader search: (( cuadernos politicas sociales. persona ; ) or ( cuadernos practicas bolonia. personas ; ))~.
• Adding a wildcard symbol may retrieve word variants: (("cuadernos politicas sociales. persona ;") or ("cuadernos practicas bolonia. personas ;"))*.