Perhaps you should try some spelling variations:
"international student" » "international students"
"international patient" » "international joint", "international students", "internationalization _"
"international waters" » "international actor", "international watercourses", "international law", "international actors", "international laws", "international trades"
"international water" » "international actor", "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 water"))) or ((("international patient") OR ("international student"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("international waters") OR ("international water"))) OR ((("international patient") OR ("international student"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"international waters\") or (\"international water\"))) or (((\"international patient\") OR (\"international student\"))))*".
• Removing quotes may allow a broader search: (((( international waters ) or ( international water ))) or ((( international patient ) OR ( international student ))))*.