Perhaps you should try some spelling variations:
"international water" » "international patient", "international law", "international transfer"
"international watercourses" » "international patientcourses", "international lawcourses", "international transfercourses"
"international trade" » "international law", "international student", "international finance"
"international actor" » "international edition"

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

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