Perhaps you should try some spelling variations:
"routledge explanations in economic theory." » "routledge expectations 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 explanatory 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 explanatory 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 explanatory 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 explanatory 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 explanatory in economic theory."))) or ("routledge examinations in economic theory."))) or ((("routledge exploration in economic theory.") or ("routledge exploitation in economic theory."))))))*.