Perhaps you should try some spelling variations:
"cientificos mexico de anestesiologia ;" » "cientificos mexicanos de anestesiologia ;", "cientificos eticos de anestesiologia ;", "cientifico tecnico de anestesiologia ;", "cientificos mexicano de anestesiologia ;"
"politica mediada de anestesiologia ;" » "politica medica de anestesiologia ;", "politica mexicana de anestesiologia ;", "politica ampliada de anestesiologia ;", "politica medida de anestesiologia ;", "politica mediadora de anestesiologia ;", "politica mediador de anestesiologia ;"

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: (("cientificos mexico de anestesiologia ;") or ("politica mediada de anestesiologia ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cientificos mexico de anestesiologia ;") OR ("politica mediada de anestesiologia ;")).
• Removing quotes may allow a broader search: (( cientificos mexico de anestesiologia ; ) or ( politica mediada de anestesiologia ; )).
• Adding a wildcard symbol may retrieve word variants: (("cientificos mexico de anestesiologia ;") or ("politica mediada de anestesiologia ;"))*.