Perhaps you should try some spelling variations:
"politica peruana de anestesiologia ;" » "politica espana de anestesiologia ;", "politica urbana de anestesiologia ;", "politica peru de anestesiologia ;"
"clinicas mexicanas de anestesiologia ;" » "clinicas mexicana de anestesiologia ;", "clinicas mexicano de anestesiologia ;", "clinicas mexicana en anestesiologia ;", "clinica mexicanas de anestesiologia ;", "clinical mexicanas de anestesiologia ;", "cronicas mexicanas 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: (("clinicas mexicanas de anestesiologia ;") or ("politica peruana de anestesiologia ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clinicas mexicanas de anestesiologia ;") OR ("politica peruana de anestesiologia ;")).
• Removing quotes may allow a broader search: (( clinicas mexicanas de anestesiologia ; ) or ( politica peruana de anestesiologia ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinicas mexicanas de anestesiologia ;") or ("politica peruana de anestesiologia ;"))*.