Perhaps you should try some spelling variations:
history mexican » history american, history medical, history mexico
lectures de » lectures _, lectures 1, lectures 2
lectura de » lectura del, lecture des, lectura en
lecture de » lecture _, lecture 1, lecture 2
lectura y » lecture _, lecture 1, lecture 2

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: ((((((lectura de) OR (lectura y))) OR (lecture de))) OR (lectures de)) history mexican.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((lectura de) OR (lectura y))) or (lecture de))) or (lectures de)) history mexican".
• Adding a wildcard symbol may retrieve word variants: ((((((lectura de) OR (lectura y))) or (lecture de))) or (lectures de)) history mexican*.