Perhaps you should try some spelling variations:
lectures field » lectures held, measures field, lectures food
lectures diel » lectures data, lectures dans, lectures dark
lectures de » lectures 1, lectures 2, lectures a
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: ((((((lectures diel) OR (lectures field))) OR (((lectures de) OR (lectures _))))) OR (lecture de)) historia (mexicana* OR mexican*).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((lectures diel) OR (lectures field))) or (((lectures de) or (lectures _))))) or (lecture de)) historia (mexicana* or mexican*)".
• Adding a wildcard symbol may retrieve word variants: ((((((lectures diel) OR (lectures field))) or (((lectures de) or (lectures _))))) or (lecture de)) historia (mexicana* or mexican*)*.