Perhaps you should try some spelling variations:
"international mexican economy series" » "international american economy series", "international medical economy series", "international media economy series", "international african economy series", "international american economic series", "international mexican economics series"
"international energy economic surveys" » "international energy economic studies", "international energy economic systems", "international energy economics surveys", "international energy economy surveys", "international ecology economic surveys"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("international energy economic surveys") or ("international mexican economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international energy economic surveys") OR ("international mexican economy series")).
• Removing quotes may allow a broader search: (( international energy economic surveys ) or ( international mexican economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international energy economic surveys") or ("international mexican economy series"))*.