Perhaps you should try some spelling variations:
"clinical mexicana en medicina interna ;" » "clinicas mexicanas en medicina interna ;", "clinical medicine en medicina interna ;", "climatica mexicana en medicina interna ;", "clinical mexicana de medicina interna ;"
"cronica mexicana la medicina interna ;" » "botanica mexicana la medicina interna ;", "prensa mexicana la medicina interna ;", "cronica mexicana a medicina interna ;", "cronica mexicano la medicina interna ;", "cronica mexicana una medicina interna ;", "cronica mexicana de medicina interna ;"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("clinical mexicana en medicina interna ;") or ("cronica mexicana la medicina interna ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clinical mexicana en medicina interna ;") OR ("cronica mexicana la medicina interna ;")).
• Removing quotes may allow a broader search: (( clinical mexicana en medicina interna ; ) or ( cronica mexicana la medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinical mexicana en medicina interna ;") or ("cronica mexicana la medicina interna ;"))*.