Perhaps you should try some spelling variations:
"serie negra-milk trade management" » "serie negra-milk sales management", "serie negra-milk risk management", "serie integral-milk trade management", "serie negra-mil trade management", "serie negra-mila trade management"
"serie mcgraw- hill de or hilo de management" » "serie mcgraw- hill de or siglo de management", "serie mcgraw- hill de or ciclo de management"

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: (("serie mcgraw-((hill de) or (hilo de)) management") or ("serie negra-milk trade management"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie mcgraw-((hill de) or (hilo de)) management") OR ("serie negra-milk trade management")).
• Removing quotes may allow a broader search: (( serie mcgraw-((hill de) or (hilo de)) management ) or ( serie negra-milk trade management )).
• Adding a wildcard symbol may retrieve word variants: (("serie mcgraw-((hill de) or (hilo de)) management") or ("serie negra-milk trade management"))*.