Perhaps you should try some spelling variations:
coleccion practica » coleccion didactica
mexicana una » mexicana en, mexicana de, mexico una
practica de » practicas de
y academia » la academia, _ academic
mexicana a » mexicana _, mexicana y, mexicana de
de y » de _, de a, de 3

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

• Performing a fuzzy search may retrieve terms with similar spellings: coleccion practica de y academia ((mexicana a) or (mexicana una)) cirugia.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: coleccion practica de y academia ((mexicana a) OR (mexicana una)) cirugia..
• Adding a wildcard symbol may retrieve word variants: coleccion practica de y academia ((mexicana a) or (mexicana una)) cirugia.*.