Perhaps you should try some spelling variations:
"altos administrativos" » "gastos administrativos", "los administrativos", "actos dministrativos"
"marco administrativos" » "marco administrativo", "cargos administrativos", "medico administrativos"
"acto administrativo" » "marco administrativo", "y administrativo", "estudio administrativo"
"actos administrativos" » "actas administrativos"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("actos administrativos") OR ("altos administrativos"))) or ((("marco administrativos") or ("acto administrativo"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("actos administrativos") OR ("altos administrativos"))) OR ((("marco administrativos") OR ("acto administrativo")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"actos administrativos\") OR (\"altos administrativos\"))) or (((\"marco administrativos\") or (\"acto administrativo\"))))".
• Removing quotes may allow a broader search: (((( actos administrativos ) OR ( altos administrativos ))) or ((( marco administrativos ) or ( acto administrativo )))).
• Adding a wildcard symbol may retrieve word variants: (((("actos administrativos") OR ("altos administrativos"))) or ((("marco administrativos") or ("acto administrativo"))))*.

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