Perhaps you should try some spelling variations:
"comerciales internacionales" » "mercados internacionales", "comercio internacional", "contratos internacionales"
"comercial internacional" » "comercio internacional", "cooperacion internacional", "convencion internacional"
"contexto internacional" » "congreso internacional", "comercio internacional", "coloquio internacional"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("comerciales internacionales") OR ("comercial internacional"))) or ("contexto internacional"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("comerciales internacionales") OR ("comercial internacional"))) OR ("contexto internacional"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"comerciales internacionales\") OR (\"comercial internacional\"))) or (\"contexto internacional\"))*".
• Removing quotes may allow a broader search: (((( comerciales internacionales ) OR ( comercial internacional ))) or ( contexto internacional ))*.