Perhaps you should try some spelling variations:
"economic studies united states methodology" » "economic studies united surveys methodology", "economic studies united sciences methodology", "economic status united states methodology", "economic sources united states methodology", "economic states united states methodology", "economic subsidies united states methodology"
"economic studies und aims methodology" » "economic status und aims methodology", "economic studies und aims methodological", "economic studies und 3 methodology", "economic studies und 2 methodology", "economic studien und aims methodology", "economic studie und aims methodology", "economic studies using aims methodology", "economic studies und abs methodology"

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: (("economic studies united states methodology") or ("economic studies und aims methodology"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("economic studies united states methodology") OR ("economic studies und aims methodology")).
• Removing quotes may allow a broader search: (( economic studies united states methodology ) or ( economic studies und aims methodology )).
• Adding a wildcard symbol may retrieve word variants: (("economic studies united states methodology") or ("economic studies und aims methodology"))*.