Perhaps you should try some spelling variations:
"Foundations of poder economico series" » "Foundations of poder economica serie", "Foundations of poder economico spines", "Foundations of poder economico sociales", "Foundations of orden economico series"
"Foundations of modern economia spines" » "Foundations of modern economic spines", "Foundations of poder economia spines", "Foundations of modelo economico spines"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Foundations of poder economico series") OR ("Foundations of modern economia spines"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Foundations of poder economico series\") OR (\"Foundations of modern economia spines\"))*".
• Removing quotes may allow a broader search: (( Foundations of poder economico series ) OR ( Foundations of modern economia spines ))*.