Perhaps you should try some spelling variations:
historia americana » historia mexicana, history american, history americas
lectura del » lectura de, lectura en, lecture des
lettura del » lettera del, lettura dei, lettura e
lecture de » 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: ((lecture de) OR (((lettura del) OR (lectura del)))) historia americana.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lecture de) or (((lettura del) OR (lectura del)))) historia americana".
• Adding a wildcard symbol may retrieve word variants: ((lecture de) or (((lettura del) OR (lectura del)))) historia americana*.