Perhaps you should try some spelling variations:
"international political economic survey" » "international policy economic survey", "international political economy survey", "international ecological economics survey", "international political economic surveys", "international political economic security", "international political economic studies"
"international energy economic services" » "international best economic services", "international energy ecological services", "international energy economic surveys", "international energy economic studies", "international energy economics services", "international energy economy 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 political economic survey") or ("international energy economic services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic survey") OR ("international energy economic services"))*.
• Removing quotes may allow a broader search: (( international political economic survey ) or ( international energy economic services ))*.