Perhaps you should try some spelling variations:
"comercio el marketing." » "comercio del marketing.", "comercio y marketing.", "comercio en marketing.", "comercio enl marketing.", "comercio yl marketing."
"comercio e marketing." » "comercio en marketing.", "comercio y marketing.", "comercio _ marketing."
"comercio de marketing." » "comercio den marketing.", "comercio dy marketing.", "comercio d_ marketing."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("comercio e marketing.") or ((("comercio el marketing.") or ("comercio de marketing."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comercio e marketing.") OR ((("comercio el marketing.") OR ("comercio de marketing."))))*.
• Removing quotes may allow a broader search: (( comercio e marketing. ) or ((( comercio el marketing. ) or ( comercio de marketing. ))))*.