Perhaps you should try some spelling variations:
"international student" » "international students"
"international waters" » "international patient", "international watercourses", "international law", "international patients", "international laws", "international transfers"
"international actor" » "international edition"
"international water" » "international patient", "international law", "international transfer"
"international trade" » "international law", "international finance"

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