Perhaps you should try some spelling variations:
"international actors" » "international editions"
"international actor" » "international edition"
"international watercourses" » "international patientcourses", "international lawcourses", "international tradecourses"
"international water" » "international patient", "international law", "international trade"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("international actors") OR ("international actor"))) or ("international watercourses"))) or ("international water"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("international actors") OR ("international actor"))) OR ("international watercourses"))) OR ("international water")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"international actors\") OR (\"international actor\"))) or (\"international watercourses\"))) or (\"international water\"))".
• Removing quotes may allow a broader search: (((((( international actors ) OR ( international actor ))) or ( international watercourses ))) or ( international water )).
• Adding a wildcard symbol may retrieve word variants: (((((("international actors") OR ("international actor"))) or ("international watercourses"))) or ("international water"))*.