Perhaps you should try some spelling variations:
"cronica mexicana en medicina internet ;" » "cronica mexicana en mediante internet ;", "cronica mexicana en medicina integral ;", "botanica mexicana en medicina internet ;", "prensa mexicana en medicina internet ;", "cronica mexicana de medicina internet ;", "cronica mexicana la medicina internet ;"
"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 ;"

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