Perhaps you should try some spelling variations:
"regulacion informal internacional" » "regulacion informal international" (Expand Search), "regulacion norma internacional" (Expand Search), "regulacion informativo internacional" (Expand Search), "educacion informal internacional" (Expand Search), "negociacion informal internacional" (Expand Search), "regulacion laboral internacional" (Expand Search)
regulacion industrial » revolucion industrial (Expand Search), relations industrial (Expand Search), aplicacion industrial (Expand Search)
revolucao industrial » revolucion industrial (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("((regulacion industrial) OR (revolucao industrial)) internacional") OR ("regulacion informal internacional"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"((regulacion industrial) OR (revolucao industrial)) internacional\") OR (\"regulacion informal internacional\"))".
• Removing quotes may allow a broader search: (( ((regulacion industrial) OR (revolucao industrial)) internacional ) OR ( regulacion informal internacional )).
• Adding a wildcard symbol may retrieve word variants: (("((regulacion industrial) OR (revolucao industrial)) internacional") OR ("regulacion informal internacional"))*.