Perhaps you should try some spelling variations:
"international policy economic status" » "international poverty economic status", "international prices economic status", "national policy economic status", "international policy economic sectors", "international policy socioeconomic status"
"international policy astronomy series" » "international poverty astronomy series", "international prices astronomy series", "national policy astronomy series", "international policy autonomy series", "international policy 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: (("international policy economic status") or ("international policy astronomy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international policy economic status") OR ("international policy astronomy series")).
• Removing quotes may allow a broader search: (( international policy economic status ) or ( international policy astronomy series )).
• Adding a wildcard symbol may retrieve word variants: (("international policy economic status") or ("international policy astronomy series"))*.