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