Perhaps you should try some spelling variations:
"cocomparative marketing" » "comparative marketing", "kooperative marketing", "kooperatives marketing"
"cooperative marketing" » "operatives marketing", "operativen marketing", "cooperative breeding", "cooperatives marketing", "cooperativen marketing", "cocomparative marketing"
"operative marketing" » "operatives marketing", "operativen marketing", "comparative marketing"

Try widening your search to All Fields.

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

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