Perhaps you should try some spelling variations:
"international student" » "international students"
"international waters" » "international patient", "international watercourses", "international law", "international patients", "international laws", "international trades"
"international actor" » "international edition"
"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 waters") or ("international actor"))) or ((("international student") or ("international water"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("international waters") OR ("international actor"))) OR ((("international student") OR ("international water")))).
• Removing quotes may allow a broader search: (((( international waters ) or ( international actor ))) or ((( international student ) or ( international water )))).
• Adding a wildcard symbol may retrieve word variants: (((("international waters") or ("international actor"))) or ((("international student") or ("international water"))))*.