Perhaps you should try some spelling variations:
coleccion practica » coleccion didactica
academica mexicana » academia mexicana, academica diana, polemica mexicana
economica mexicana » economia mexicana, economico mexicano, economica mexico
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "coleccion practica de y ((academica mexicana) OR (economica mexicana)) la cirugia.~".
• Adding a wildcard symbol may retrieve word variants: coleccion practica de y ((academica mexicana) OR (economica mexicana)) la cirugia.*.