Perhaps you should try some spelling variations:
"clinicas mexicana en medicina interna ;" » "clinicas mexicanas en medicina interna ;", "cronica mexicana en medicina interna ;", "climatica mexicana en medicina interna ;", "clinicas mexicana de medicina interna ;", "clinicas mexicana la medicina interna ;"
"Clínicas mexicana a medicina interna ;" » "Clínicas mexicana _ medicina interna ;", "Clínicas mexicana y medicina interna ;", "Clínicas mexicana una medicina interna ;", "Clínicas mexicana la medicina interna ;", "Clínicas mexicana 2 medicina interna ;"

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 mexicana en medicina interna ;") or ("Clínicas mexicana a medicina interna ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clinicas mexicana en medicina interna ;") OR ("Clínicas mexicana a medicina interna ;")).
• Removing quotes may allow a broader search: (( clinicas mexicana en medicina interna ; ) or ( Clínicas mexicana a medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinicas mexicana en medicina interna ;") or ("Clínicas mexicana a medicina interna ;"))*.