Perhaps you should try some spelling variations:
"contrary professor" » "contrario professor", "contra professor", "contrast professor", "contrary profesor", "contrary professores", "contrary profesion"
"contrary profesora" » "contrario profesora", "contra profesora", "contrast profesora", "contrary profesor", "contrary profesores"
"contrato profesorado" » "contrato profesordo", "contrato profesoresdo", "contrario profesorado", "contra profesorado"

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

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