Perhaps you should try some spelling variations:
"international political economy series" » "international policy economy series", "international political economic series"
international social » international journal, international seminar, international commercial
"International social ecological services" » "International social hydrological services", "International social clinical services", "International social meteorological 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 economy series") or ("International social ecological services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economy series") OR ("International social ecological services")).
• Removing quotes may allow a broader search: (( international political economy series ) or ( International social ecological services )).
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