Perhaps you should try some spelling variations:
"international political economy services" » "international policy economy services", "international political economic services", "international political economy series", "international political recovery services"
"international energy meteorological services" » "international energy meteorological stations", "international world meteorological services", "international hydro meteorological services", "international energy ecological services"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("international political economy services") or ("international energy meteorological services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economy services") OR ("international energy meteorological services")).
• Removing quotes may allow a broader search: (( international political economy services ) or ( international energy meteorological services )).
• Adding a wildcard symbol may retrieve word variants: (("international political economy services") or ("international energy meteorological services"))*.