Perhaps you should try some spelling variations:
"clinica mexicana en medicina interna ;" » "clinicas mexicanas en medicina interna ;", "cronica mexicana en medicina interna ;", "climatica mexicana en medicina interna ;", "clinica mexicana de medicina interna ;", "clinica mexicana la medicina interna ;"
"clinica mexicano de medicina interna ;" » "clinicas mexicanas de medicina interna ;", "clinica medica de medicina interna ;", "cronica mexicana de medicina interna ;", "clinica mexicana de 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: (("clinica mexicana en medicina interna ;") or ("clinica mexicano de medicina interna ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clinica mexicana en medicina interna ;") OR ("clinica mexicano de medicina interna ;")).
• Removing quotes may allow a broader search: (( clinica mexicana en medicina interna ; ) or ( clinica mexicano de medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinica mexicana en medicina interna ;") or ("clinica mexicano de medicina interna ;"))*.