Perhaps you should try some spelling variations:
"management model marketing" » "management moral marketing", "management empower marketing", "management social marketing", "management del marketing", "management movil marketing", "management mobile marketing"
"management de marketing" » "management _ marketing", "management data marketing", "management case marketing"
"management y marketing" » "management _ marketing", "management study marketing", "management del marketing"

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: (("management model marketing") or ((("management de marketing") OR ("management y marketing"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("management model marketing") OR ((("management de marketing") OR ("management y marketing")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"management model marketing\") or (((\"management de marketing\") OR (\"management y marketing\"))))".
• Removing quotes may allow a broader search: (( management model marketing ) or ((( management de marketing ) OR ( management y marketing )))).
• Adding a wildcard symbol may retrieve word variants: (("management model marketing") or ((("management de marketing") OR ("management y marketing"))))*.