Perhaps you should try some spelling variations:
"international policy economic surveys" » "international poverty economic surveys", "international prices economic surveys", "national policy economic surveys", "international policy economic studies", "international policy economic systems"
"international bond economic services" » "international bank economic services", "international banks economic services", "international best economic services", "international bond economics series", "international bond ecological services", "international bond economic studies", "international beyond economic services", "international sound economic services", "international good economic services"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international policy economic surveys") OR ("international bond economic services"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international policy economic surveys\") OR (\"international bond economic services\"))*".
• Removing quotes may allow a broader search: (( international policy economic surveys ) OR ( international bond economic services ))*.