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

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