Perhaps you should try some spelling variations:
"Foundations of modelo economico theories" » "Foundations of modelo economic theories", "Foundations of modelo economics theories", "Foundations of modelo economic theory", "Foundations of modelos economicos theories", "Foundations of poder economico theories", "Foundations of proceso economico theories"
"Foundations of poder economica spines" » "Foundations of poder economia spines", "Foundations of poder economico spines", "Foundations of power economic 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 modelo economico theories") OR ("Foundations of poder economica spines"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Foundations of modelo economico theories\") OR (\"Foundations of poder economica spines\"))".
• Removing quotes may allow a broader search: (( Foundations of modelo economico theories ) OR ( Foundations of poder economica spines )).
• Adding a wildcard symbol may retrieve word variants: (("Foundations of modelo economico theories") OR ("Foundations of poder economica spines"))*.