Perhaps you should try some spelling variations:
"personal de secretaria OR de secretarios ." » "personal de secretaria OR del secretario ." (Expand Search), "personal de secretaria OR y secretarios ." (Expand Search), "personal de secretaria OR los secretarios ." (Expand Search), "personal del secretario OR de secretarios ." (Expand Search), "personal le secretariat OR de secretarios ." (Expand Search), "personal la secretaria OR de secretarios ." (Expand Search)
"personal y secretaria." » "personal y secretario." (Expand Search), "personal la secretaria." (Expand Search), "personal y secretarios." (Expand Search)

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