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