Perhaps you should try some spelling variations:
"international environmental agreements" » "international environmental management", "international environmental asessment", "international environmental movement", "internacional environmental agreements"
"internacionales environmental agreements" » "internacionales environmental management", "internacionales environmental asessment", "internacionales environmental movement"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international environmental agreements") OR ("internacionales environmental agreements"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international environmental agreements\") OR (\"internacionales environmental agreements\"))".
• Removing quotes may allow a broader search: (( international environmental agreements ) OR ( internacionales environmental agreements )).
• Adding a wildcard symbol may retrieve word variants: (("international environmental agreements") OR ("internacionales environmental agreements"))*.