Perhaps you should try some spelling variations:
"qualitative economics" » "cualitativa economics", "cualitativo economics", "qualitative economicos", "qualitative economica", "qualitative economico"
"qualitative economicas" » "cualitativa economicas", "cualitativo economicas", "qualitative economica", "qualitative economico"
"qualitative economia" » "cualitativa economia", "cualitativo economia"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("qualitative economics") OR ((("qualitative economicas") OR ("qualitative economia"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"qualitative economics\") OR (((\"qualitative economicas\") OR (\"qualitative economia\"))))".
• Removing quotes may allow a broader search: (( qualitative economics ) OR ((( qualitative economicas ) OR ( qualitative economia )))).
• Adding a wildcard symbol may retrieve word variants: (("qualitative economics") OR ((("qualitative economicas") OR ("qualitative economia"))))*.