Perhaps you should try some spelling variations:
historia mexican » historia mexico, history mexican, historia americana
lecturas de » lecturas del, lecteurs de, lecture de
lectures de » lectures _, lectures 1, lectures 2
lectura de » lectura del, lecture de, lecture des
mexicana » americana

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