Perhaps you should try some spelling variations:
coleccion practica » coleccion didactica
academico mexicana » academia mexicana, academicos mexico
un academico » ano academico, lo academico, y academico
practica de » practicas de
la cirugia » en cirugia
de cirugia » en cirugia

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: coleccion practica de un academico mexicana ((la cirugia) OR (de cirugia)).~.
• Adding a wildcard symbol may retrieve word variants: coleccion practica de un academico mexicana ((la cirugia) or (de cirugia)).*.