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