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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( serie antropologia y ecologia. ) or ( de antropologia ((de ecologia) OR (de economia)). ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( serie antropologia y ecologia. ) OR ( de antropologia ((de ecologia) OR (de economia)). )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( serie antropologia y ecologia. ) or ( de antropologia ((de ecologia) OR (de economia)). ))".
• Adding a wildcard symbol may retrieve word variants: (( serie antropologia y ecologia. ) or ( de antropologia ((de ecologia) OR (de economia)). ))*.