Perhaps you should try some spelling variations:
"international political economic factors" » "international policy economic factors", "international political economy factors", "international ecological economics factors", "international political economic sectors", "international political economic history"
"international roads economic forces" » "international road economic forces", "international bonds economic forces", "international bond economic forces", "international roads economic focus", "international roads economic forecast", "international roads economic forum"

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