Perhaps you should try some spelling variations:
financial surveys » financial stress, financial services, financial burden
financial service » financial services
financial systems » financial system, financial statements
financial series » financial services, financial studies, financial stress
world economic » world economy

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

• If you are trying to use Boolean operators, they must be ALL CAPS: "((\"world economic AND ((((financial surveys) OR (financial service))) OR (financial series)).\") or (\"world economic AND financial systems.\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"world economic and ((((financial surveys) OR (financial service))) or (financial series)).\\") or (\\"world economic and financial systems.\\"))\"".
• Removing quotes may allow a broader search: (( world economic and ((((financial surveys) OR (financial service))) or (financial series)). ) or ( world economic and financial systems. )).