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 ;", "clinical mexicana la medicina interna ;"
"cronica mexicana en medicina interna ;" » "botanica mexicana en medicina interna ;", "prensa mexicana en medicina interna ;", "cronica mexicana de medicina interna ;", "cronica mexicana la 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 en medicina interna ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"clinical mexicana en medicina interna ;\") OR (\"cronica mexicana en medicina interna ;\"))".
• Removing quotes may allow a broader search: (( clinical mexicana en medicina interna ; ) OR ( cronica mexicana en medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinical mexicana en medicina interna ;") OR ("cronica mexicana en medicina interna ;"))*.