Perhaps you should try some spelling variations:
serie antropologia » serie antologias, sociales antropologia
de antropologia » la antropologia
antropologia e » antropologia de, antropologia en, antropologia y
de economia » y economia
la economia » y economia
e ecologia » de ecologia, en ecologia, y ecologia

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: (( de antropologia e ecologia. ) OR ( serie antropologia ((de economia) OR (la economia)). ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( de antropologia e ecologia. ) or ( serie antropologia ((de economia) OR (la economia)). ))~".
• Adding a wildcard symbol may retrieve word variants: (( de antropologia e ecologia. ) or ( serie antropologia ((de economia) OR (la economia)). ))*.