Perhaps you should try some spelling variations:
"national poverty socioeconomic status" » "national poverty macroeconomic status", "national adverse socioeconomic status", "national lower socioeconomic status", "national poverty socioeconomic states"
"international rich economy series" » "international rice economy series", "international price economy series", "international risk economy series", "international rich economics series", "international rich economies series", "international french economy series", "international cash economy series"

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: (("national poverty socioeconomic status") or ("international rich economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("national poverty socioeconomic status") OR ("international rich economy series")).
• Removing quotes may allow a broader search: (( national poverty socioeconomic status ) or ( international rich economy series )).
• Adding a wildcard symbol may retrieve word variants: (("national poverty socioeconomic status") or ("international rich economy series"))*.