Perhaps you should try some spelling variations:
coleccion practica » coleccion didactica
economica mexicana » economico mexicano, economica mexico, tecnologica mexicana
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.

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