Perhaps you should try some spelling variations:
"Foundations of modern economicas spines" » "Foundations of modern economic spines", "Foundations of modelos economicos spines", "Foundations of modelo economico spines", "Foundations of modern economica spines", "Foundations of modern economia spines"
"Foundations of poder economico spines" » "Foundations of poder economica spines", "Foundations of poder economia spines", "Foundations of orden economico spines"

Try widening your search to All Fields.

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 modern economicas spines") OR ("Foundations of poder economico spines"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Foundations of modern economicas spines\") OR (\"Foundations of poder economico spines\"))".
• Removing quotes may allow a broader search: (( Foundations of modern economicas spines ) OR ( Foundations of poder economico spines )).
• Adding a wildcard symbol may retrieve word variants: (("Foundations of modern economicas spines") OR ("Foundations of poder economico spines"))*.