Perhaps you should try some spelling variations:
"clinical mexicano de medicina internet ;" » "clinical medicine de medicina internet ;", "clinica medica de medicina internet ;", "liberal mexicano de medicina internet ;", "clinical mexicano de medicina interna ;", "clinical mexicano de mediante internet ;", "clinical mexicano de medicina integral ;", "clinical mexicana de medicina internet ;"
"clinicas mexicanas de medicina internet ;" » "clinicas mexicanas de medicina interna ;", "clinicas mexicanas de mediante internet ;", "clinicas mexicanas de medicina integral ;", "clinicas mexicana de medicina internet ;", "clinicas mexicana en medicina internet ;", "clinicas mexicana _ medicina internet ;"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("clinical mexicano de medicina internet ;") OR ("clinicas mexicanas de medicina internet ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"clinical mexicano de medicina internet ;\") OR (\"clinicas mexicanas de medicina internet ;\"))".
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• Adding a wildcard symbol may retrieve word variants: (("clinical mexicano de medicina internet ;") OR ("clinicas mexicanas de medicina internet ;"))*.