Perhaps you should try some spelling variations:
"Foundations of modern economics theories" » "Foundations of modern economic theory", "Foundations of modern economicos teoria", "Foundations of modern economic theories", "Foundations of poder economico theories", "Foundations of modelo economico theories"
"Foundations of poder economic theories" » "Foundations of poder economic theory", "Foundations of poder economico theories", "Foundations of poder economia theories", "Foundations of power economic theories"

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