Perhaps you should try some spelling variations:
"international political economic surveys" » "international policy economic surveys", "international political economy surveys", "international ecological economics surveys"
"international energy psychological services" » "international energy hydrological services", "international energy ecological services", "international energy psychological therapies", "international best psychological services"

Try widening your search to All Fields.

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 energy psychological services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic surveys") OR ("international energy psychological services")).
• Removing quotes may allow a broader search: (( international political economic surveys ) or ( international energy psychological services )).
• Adding a wildcard symbol may retrieve word variants: (("international political economic surveys") or ("international energy psychological services"))*.