Perhaps you should try some spelling variations:
tecnologica mexicana » tecnologica mexico, tecnologicas mexico, tecnologia medica
coleccion practica » coleccion didactica
economia mexicana » economica mexico, economia espana, academia mexicana
practica de » practicas de
la cirugia » en cirugia, de cirugia
de y » de _, de a, de 3

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