Perhaps you should try some spelling variations:
"routledge explanations in economic theory." » "routledge expectations in economic theory.", "routledge explanatory in economic theory.", "routledge plantations in economic theory."
"routledge examinations in economic theory." » "routledge examination in economic theory."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("routledge explanation in economic theory.") or ((((("routledge explanations in economic theory.") OR ("routledge examinations in economic theory."))) or ((("routledge exploration in economic theory.") or ("routledge exploitation in economic theory."))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("routledge explanation in economic theory.") OR ((((("routledge explanations in economic theory.") OR ("routledge examinations in economic theory."))) OR ((("routledge exploration in economic theory.") OR ("routledge exploitation in economic theory.")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"routledge explanation in economic theory.\") or (((((\"routledge explanations in economic theory.\") OR (\"routledge examinations in economic theory.\"))) or (((\"routledge exploration in economic theory.\") or (\"routledge exploitation in economic theory.\"))))))".
• Removing quotes may allow a broader search: (( routledge explanation in economic theory. ) or ((((( routledge explanations in economic theory. ) OR ( routledge examinations in economic theory. ))) or ((( routledge exploration in economic theory. ) or ( routledge exploitation in economic theory. )))))).
• Adding a wildcard symbol may retrieve word variants: (("routledge explanation in economic theory.") or ((((("routledge explanations in economic theory.") OR ("routledge examinations in economic theory."))) or ((("routledge exploration in economic theory.") or ("routledge exploitation in economic theory."))))))*.