Perhaps you should try some spelling variations:
"international oil economies twenty" » "international journal economies twenty", "international oil economies theory", "international oil economies ten", "international oil economies country", "international oil economic twenty", "international local economies twenty", "international moral economies twenty"
"international du economy fierce" » "internationale du economy fierce", "international de economy fierce", "international des economy fierce", "international du economy finance", "international du economy field", "international du economy figure", "international eu economy fierce", "international dual economy fierce", "international iou economy fierce"

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 oil economies twenty") or ("international du economy fierce"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international oil economies twenty") OR ("international du economy fierce")).
• Removing quotes may allow a broader search: (( international oil economies twenty ) or ( international du economy fierce )).
• Adding a wildcard symbol may retrieve word variants: (("international oil economies twenty") or ("international du economy fierce"))*.